Kira made her first appearance in Anchors, where she was introduced to her father's history class at Beacon Hills High School. Ken brought up the fact that she had yet to have any friends over since they moved to Beacon Hills three weeks earlier, much to Kira's embarrassment. However, Scott McCall turned to look at her and seemed immediately smitten, which helped alleviate the awkwardness. In the hallway after class, Kira was complaining about Ken's embarrassing behavior when she suddenly noticed that something was wrong with Scott; unbeknownst to her, Scott was losing control of his Werewolf transformation, and she watched in confusion as Stiles Stilinski quickly ushered him into a classroom to get away from prying eyes.
Later that day, Kira overheard Scott, Stiles, Allison Argent, Lydia Martin, and Isaac Lahey talking at lunch about Scott, Allison, and Stiles's recent near-death experiences and the horrifying side effects they had been suffering since and went over to talk to them. She nervously informed them that she thought she knew what they were talking about and started to explain what she knew about the Buddhist concept of Bardo, which had side effects similar to the ones that they were experiencing, including auditory and visual hallucinations and being visited by peaceful and wrathful deities, such as demons. When Lydia somewhat rudely asked her what her name was, Scott jumped into the conversation and replied that her name was Kira, which made Kira smile, and explained that she was in his history class. Allison asked what happened during the end of the progressive states of Bardo, Kira answered that it was "death," not realizing how serious their current situation was.
In More Bad Than Good, Kira approached Scott before history class started, where she informed him that she had done some more research for him on Bardo to help clarify her "all over the place" explanation of the concept the previous day. Scott, appreciative of her help, stated that she didn't have to go through all that trouble while she was searching for the research in her bookbag, and Kira absentmindedly replied that it only took her a few hours, a gesture by which Scott seemed to be genuinely touched. Finally, Ken approached Kira with the stack of Bardo printouts Kira collected and remarked that she "forgot all that research she did for that boy she likes," which once again embarrassed Kira, though Scott seemed flattered that she had a crush on him.
Kira awkwardly took her seat and watched as her father started class. When Stiles was asked to come up to the front of the class and read an excerpt from their book, Kira watched as he nervously went to the podium to read. Unfortunately for Stiles, the side-effects from his death and resurrection (along with, unbeknownst to anyone else, the fact that he was currently possessed by the weakened Nogitsune) caused him to hallucinate that the words were falling off the page and led him to have a panic attack in front of the class. Kira looked worried as Scott helped Stiles get to the locker room to calm him down, and after the bell rang, she saw that they had both forgotten their bookbags and picked them up so she could return them.
However, what she didn't know was that Stiles' bookbag contained a baby doll that he had taken from the scene of the car accident where Malia Tate, a Werecoyote, had inadvertently killed her adoptive mother and sister on her first full moon several years earlier, which led Malia, in full-coyote form, to chase Kira into the locker room in an attempt to get it back. Kira dropped the bags and hid behind a row of lockers, where she was eventually found by Scott, who knocked over the lockers to scare Malia away, though he did not explain the coyote's true identity to Kira. When the Sheriff's department arrived to check out the scene, Ken asked Kira why she was in the locker room instead of the cafeteria with the rest of the students, and Kira glumly replied that she was just trying to do something nice for Scott and Stiles, since she thought that doing something nice would help her make friends, not realizing that Scott was eavesdropping on this conversation and had made a mental note to be friendly to her in the future.
In Galvanize, Stiles caught Scott checking out Kira while she was at her locker, and when Stiles saw her drop her books onto the floor, he remarked that he could tell Scott liked Kira and that he should ask her out, though Scott seemed too shy to do so. Later that afternoon, Kira was eating lunch with her father Ken in his classroom, where he brought up the fact that she should be eating with her friends in the cafeteria. Kira suggested that she just wanted to keep him company, but Ken retorted that she should be embarrassed to be seen with him before getting to the true reason Kira was there, which was that she was still having trouble making friends in Beacon Hills. Kira ruefully replied that she had plenty of friends back in New York, but that every time she tries to get to know someone, she starts rambling like an idiot. Ken quoted Samuel Beckett, "Try again. Fail again. Fail better," and assured her that someone would take interested, even after Kira reminded him that the only person who showed her interest was a "rabid coyote". Not knowing that Scott was eavesdropping once again outside the room, Kira insisted that she didn't want a boyfriend, but that she did want to make some friends.
After school, Kira was in her lounge clothes in her bedroom when Ken returned home from school to inform her that she needed to change into something nice because he invited a guest to dinner. As if on cue, the doorbell of the Yukimura House rang, and Ken added that he was calling that night the "Thank you for saving my daughter from being a coyote dinner" dinner and opened the door to reveal he had invited Scott to eat with them. Kira, embarrassed about being in her sweats, smiled awkwardly before going into her bedroom to change. Shortly afterward, Scott and Kira joined Ken and Noshiko at the table, where Ken had prepared a platter of fancy sushi. When it became obvious that Scott had never had sushi before, Kira groaned in embarrassment before reminding her parents that they were supposed to have lasagna, but Scott, wanting to make a good impression, insisted that he could eat anything. However, when he began to struggle with his chopsticks, Kira helped him learn how to use them properly, and when he dropped his piece of sushi while he was trying to eat it, Kira caught it in mid-air and cutely fed it to him, leading her parents to realize that she did indeed have feelings for him.
Kira, Scott, Noshiko, and Ken continued to make polite small talk at dinner, during which time Scott remarked that Yukimura was a Japanese name. Kira rolled her eyes as Ken explained that while Noshiko was Japanese, he himself was Korean, and that he chose to take her name because of her family's unique heritage, as well as because they married in Japan, where couples were required to belong to the same koseki, or family. When Ken added that he was going to do a unit in his history class on Noshiko's unique lineage, Kira became embarrassed, to which Noshiko scolded her about being proud of her heritage. Just then, Kira realized that all of Scott's wasabi was gone, and Scott, whose mouth and throat were burning, gasped that he thought it was guacamole.
After the somewhat disastrous dinner, Kira took Scott to her room, where she brought a Hawaiian pizza she had ordered for her and Scott to eat, admitting that she probably should have started him on California rolls as she and Scott had their post-dinner snack. At the end of the evening, Kira walked Scott out to his motorbike, during which time he thanked her for having him and joked that the pizza, not the sushi, was good. Kira remarked that he was a good guy, and not just because he saved her from being eaten by a coyote; when Scott asked her what else he did, she smiled and reminded him that he remembered her name. However, just before Scott was about to leave, William Barrow appeared with a crowbar and knocked Scott out with it by hitting him over the head before capturing Kira. Meanwhile, at the high school, Stiles and Lydia had just found a code left on the chalkboard that instructed Barrow to kill Kira and immediately went to find Scott so they could save her.
Barrow brought Kira to the electric substation where he used to work, where he threatened her with a large electrical wire that he had cut, which was sparking all over the place. He took her cell phone out of her pocket and used it to take a picture of her as proof of their time together before asking her if she had ever seen the original 1960's black and white movie Village of the Damned. He explained that it was a film about beautiful, blonde-haired children with glowing eyes who could force people to do things, and that he, too, had seen children with glowing eyes, but when he tried to tell the authorities what he saw, they just laughed at him.
He went on to say that he planned to shake them out of their paralysis with Kira, and picked up the live wire in order to shock her with it, only for Scott to appear behind him and distract him. Kira attempted to order Scott to run away, but Scott insisted that Kira wasn't the one he wanted, as he had determined that Barrow wanted supernatural teenagers and had assumed that Kira was a regular human. Unfortunately for Scott, Barrow hit him with the live wire, sending him flying backward against the fence surrounding a generator and weakening him with the electricity he could do nothing to stop Barrow from holding the wire toward Kira's face. However, before it could make contact, Kira's Kitsune powers activated for the first time as a defense mechanism and caused all of the generators in the substation to explode in showers of bluish-white foxfire, hitting Barrow with such force that it electrocuted him to death and causing a city-wide blackout due to the damage to the generators. Scott then watched in shock as Kira, who was completely stunned herself, unconsciously absorbed all of the foxfire through the palms of her hands, neither one understanding what she had just done.
In Illuminated, Kira, Scott, Stiles, and Lydia were brought into the Sheriff's station to be questioned by Special Agent McCall and Sheriff Stilinski on what happened at the electric substation. Kira remained quiet while the rest of the teens, who were more experienced in these matters, talked in circles to distract Agent McCall from what had really happened. However, when the FBI agent asked Kira if their account was truly what had happened, Scott, Stiles, and Lydia stared at Kira until she weakly insisted that it was the truth. When Kira asked Agent McCall if she could have her phone back, he denied her request, informing her that it was evidence in the case before handing it to a deputy to put in the evidence lock-up. He then informed Kira that she could go home after she filled out some paperwork regarding the attack.
When Kira got home that night, she lit a candle in her room before nervously grabbing her digital camera and taking a photograph of herself with the flash in front of a mirror. When she looked at the photo on the viewfinder, she became even more anxious when she saw that there is a fiery-looking aura around her in it. The next day at school, the fact that the town was still affected by the blackout was the talk of the town, though only the McCall Pack knew that it was Kira who had caused it. When Scott attempted to talk to Kira, Stiles immediately stopped him, as he (incorrectly) suspected that Kira was yet another "psychopathic monster" who was trying to kill them, and insisted that Scott avoid any interaction with her until they figured out what she was. Scott thought that she was just like him, a werewolf, but Stiles reminded him that she walked through "1.21 jiggawatts" of electricity, which meant she wasn't like him. Scott continued to stare at Kira anyway, which she noticed before turning and rushing away from them.
At lunch, Kira was sitting against the wall in the corner of one of the hallways when Scott walked over and sat next to her. She instantly told him she didn't want to talk about what happened, so Scott respected her wishes and instead brought up the pre-calculus test that they had on Friday. After a moment, Kira changed her mind about talking about what had happened the previous night and asked Scott if he had his phone. When Scott replied that he did, Kira informed him that she was going to show him something that no one else had seen and instructed him to take a photo of her with the flash on. Scott did as he was asked, and when he saw the photo he had taken on his phone, he, too, was shocked to see the fiery aura around her and asked her what it was. Kira admitted that she had no idea, and that it had just started happening several months earlier and only showed up with the flash on. She then nervously confessed that the only other person who knew was William Barrow, who used her own phone to take a picture of her to prove it. Scott realized that this was why Kira was so intent on getting her phone back from the deputies, and when Kira admitted that she was afraid of what the authorities would think if they saw the photos, Scott vowed to help Kira get her phone back.
That night, Scott and Kira met up with Stiles in the back parking lot of the Sheriff's station, where Stiles gave them copies of the key cards to the doors in the station that he cloned with an RFID emulator. Kira nervously pulled Scott aside and asked him if he told Stiles about what she told him, but when Scott assured her that he didn't and had instead lied that Kira had naked photos on her phone she didn't want the deputies to see, Kira happily remarked that it was a good idea before they returned to Stiles, who gave them directions to the evidence lock-up but ultimately warned them that if they got caught, he couldn't help them, thanks to Agent McCall's current impeachment case against Sheriff Stilinski.
The two thanked Stiles before sneaking inside the station and into the evidence lock-up, which was also doubling as Agent McCall's office. When they found Kira's phone was dead, they frantically searched the office for a charger cable, and continued to hide in the room while Stiles distracted Agent McCall against his own earlier protests. They somehow managed to successfully delete all the photos of Kira's aura from her phone before sneaking out, where Kira, exhilarated by the rush of adrenaline caused by their criminal act, exclaimed that their sneak-in was both terrifying and awesome before asking Scott and Stiles if they've ever done anything like that before. Once their buzz wore off, Scott awkwardly remarked that he should probably get Kira home, to which Kira frowned in disappointment before agreeing with him. However, once the two got on Scott's motorbike, he mustered up enough nerve to ask Kira if she wanted to go to a party at Derek's loft, and she excitedly accepted his offer.
Scott, Kira, and Stiles arrived at the party, which was being thrown by Danny Mahealani and the twins, Ethan and Aiden at Derek's loft without Derek's knowledge, to find hundreds of people in various stages of dress who were all drinking and covered in UV paint that was illuminated by the blacklights around the room. When Stiles went off to find Caitlin, Scott, seeing that Kira was getting bumped around by the crowds of people, took her hand in his so they wouldn't be separated. Kira, overwhelmed with affection for Scott, thanked him for everything that he had done for her, but when she saw Scott and his ex-girlfriend Allison Argent staring at each other from across the room, she became disappointed and let go of his hand before walking through the crowd. When Scott realized she was gone, he allowed his werewolf eyes to come out so that he could more easily find Kira in the crowd; to his surprise, he realized when he found Kira that his werewolf sight could see the fiery aura that surrounded her, and that it took the shape of a fox, which wasn't visible on the photos he had seen of her.
Kira ended up catching back up with Scott before the two headed up to the roof of Derek's loft so they could talk privately. She informed him that he had UV paint on his face, and when he was unable to get it himself, she licked her thumb and wiped it off for him, causing Scott to laugh and tease her for "mom-ing" him. After a moment of awkward silence, Kira asked Scott how he was so okay with everything that he had learned about her, pointing out that anyone else who had seen her aura and her electrokinesis would be running as far away as possible from her. Scott assured her that it wasn't that bad and corrected her when she stated that she looked like a "demon from hell," instead pointing out that her aura looked like armor that was protecting her. When she asked him what shape it took, Scott hesitated before replying that it looked like a fox, which seemed to trigger something in Kira's memory.
Several minutes later, Scott heard Derek's howl for help after the latter had awoken following an encounter with the Oni (though they didn't know what the creatures were at the time) and accompanied Kira back to the party to investigate. When they got there, they found that nearly all of the party attendants had left, leaving only Scott, Kira, Derek, Allison, Isaac Lahey, Ethan, Aiden, and five Oni. Since the Oni had already checked and branded Isaac, Derek, Lydia, and Ethan, they then set their sights on Aiden, causing Scott and Derek to start to fight with the Oni while Kira watched in horror from the corner.
However, the two were quickly defeated by the Oni, allowing them to go after Aiden, who also branded him with the jiko kanji as they had the others. When the Oni then turned their focus to Kira, Scott, who had avoided shifting into werewolf form thus far, let his red eyes, fangs, and claws come out as he positioned himself in front of Kira to protect her as he growled at them. When he looked back at Kira to make sure she was okay, he saw her eyes widen in shock when she realized that he wasn't human. However, before the Oni could do anything more, the sun rose and caused them all to dissolve into black smoke before teleporting away.
In Silverfinger, Kira returned home from the party that morning and flopped onto her bed before experiencing a flashback to just a few minutes earlier when Scott dropped her off on his motorcycle. While she was getting off of his bike, she hesitantly asked him if he and his friends were werewolves, which he confirmed, though it was clear he was sure she would react with fear like everyone else who had learned about his supernatural identity. However, Kira was actually quite excited to learn that werewolves were real and asked Scott if he would show her his transformation, and though he was reluctant to do so, he ultimately complied. She smiled as she touched his werewolf face, and Scott was so shocked by how open and accepting she was about his secret that his eyes went from Alpha red to their usual brown.
A few hours later, Kira arrived at school and saw Scott talking to Ethan and Aiden about the events of the previous night, such as their run-in with the Oni and the fact that the twins believed Scott was their next target. The sight of Kira led Scott to realize that the Oni could be after her, since she had recently displayed supernatural powers of her own. After school, Kira removed the spark plugs from Ethan and Aiden's motorcycles to give her and Scott a head start to the McCall House to prepare for nightfall, since that was when they believed the Oni would return. At Scott's house, Kira helped Scott lock all the doors and windows, and seemed surprised when Scott explained that his boss, Alan Deaton, had installed a "security system" in the house that only his mother Melissa could arm.
They then went up to Scott's room, where Kira insisted that she didn't want anyone to get hurt because of her, especially Scott himself, but Scott assured her that it could be either of them that the Oni were after. However, Kira maintained that she wasn't so sure and pulled out a book that she found at her house on Japanese mythology, explaining that she believed she was a Kitsune, a trickster spirit. She then showed him the pages on Kitsune, which detailed foxfire, a form of fire or lightning that resembled the electricity she discharged when William Barrow tried to kill her. She also explained that, according to the lore, foxes and wolves don't get along, but Scott simply shut the book and reminded her that it was just a story in a children's book. When Kira brought up that she told her parents she would be home for dinner, Scott insisted that she stay so he could protect her, suggesting that she tell her parents she was on a date. The two were about to kiss when they suddenly heard the front door open, leading Scott to assume that his mother was finally home to arm their "security system."
However, when they went downstairs, they were both shocked to see Scott's father, Rafael McCall, standing in the dining room instead, looking very unhappy. Knowing that the Oni could be coming as soon as the sun went down, Kira watched Scott as he angrily confronted his father about being there, which led Rafael to show them the photo his laptop had taken of Scott and Kira when they broke into his office to delete the photos of Kira's aura off of her phone. When he demanded an explanation as to why they had broken into his office, Kira looked as though she was about to tell the truth when Melissa returned home to find Scott yelling at his father to get out of the house. When she asked them to explain what was going on, Kira noticed the sun setting and tried to warn Scott about it, but it was too late-- as soon as the sky became dark, three Oni appeared in the living room. Rafael saw them and believed them to simply be costumed intruders, and when he demanded to know who they were, the Oni perceived him as impeding their mission and stabbed him in the shoulder, leading Kira to scream in horror.
Just then, Derek Hale burst through the front door, fully wolfed-out, and roared at the Oni before engaging in a fight with them, leading Scott to do the same. Kira backed away from the fight and watched in horror as Melissa dragged Rafael out of the way to assess his injuries. She became even more frightened when Ethan and Aiden jumped through the windows to help in the fight, allowing the four werewolves to wrangle the Oni outside just in time for Melissa to break a jar of Mountain Ash in the threshold to keep them out.
Kira, who had never seen Mountain Ash before, looked at it curiously and held out her hand toward the barrier between the inside of the house and the Oni outside. Aiden happened to see Kira's hand repelled by the barrier and was shocked to learn that she was supernatural. Believing she may be a threat, he started to question Kira on what she was, and when Ethan, not knowing what was going on, tried to get his brother to calm down, he grabbed Kira by the wrist and put her hand up toward the Mountain Ash barrier again to show him that she couldn't pass through it either. When he once again demanded to know what she was, Derek entered the room and informed him that she was obviously a Kitsune, pointing out that he could see her aura if he used his werewolf eyes. Kira, shocked to have her suspicions confirmed, seemed intrigued as Derek explained that younger Kitsune give off an aura that they need to learn how to hide, and stated that she likely didn't know what type she was, either.
This led Kira to become convinced that she was the evil spirit that the Oni was hunting, and she argued with Scott that since tricksters were supposed to trick people with their shapeshifting, the evil spirit could easily be her. However, Scott assured her that he has seen evil creatures and that he knows she's not one of them. Scott got a phone call from Allison, who had just talked to Katashi about Kitsune, specifically the Nogitsune who the Oni was hunting, just as the Oni had broken through the Mountain Ash barrier. This led Scott to instruct Ethan, Aiden, and Derek to stand down before he took Kira's hand and asked her if she trusted him. When she nodded in confirmation, he led her in front of the Oni so they could test them, since Allison had told Scott that they wouldn't hurt them as long as they passed their test. Once Scott and Kira's test from the Oni was finished, they branded the jiko kanji behind their ears like they did the others and disappeared. They were so weak that they both collapsed onto the floor, and Derek and the twins rushed over to assure them that they were okay.
In Riddled, Kira was studying on her bed around midnight when she leaned over to turn on the lamp on her bedside table. Upon turning the dial, she found that her light bulb had burned out and called out to her mother to see if they had any extra ones. When she took the lampshade off and prepared to unscrew the dead bulb, small bolts of foxfire discharged from her fingertips and briefly lit the bulb, causing her to jerk her hand away. Stunned and somewhat curious about this involuntary display of her powers, Kira reached over to grab the light bulb again and looked surprised as the bulb lit up brighter and brighter as her foxfire-tipped fingers powered it up.
Suddenly, the bulb exploded due to being overwhelmed by her power, just as Noshiko walked into the room. She was visibly displeased by Kira's growing powers and sternly asked her what she did, but when Kira quickly insisted it was just an accident, Noshiko argued that it was far too late for her to be awake before she removed the remainder of the broken light bulb from the lamp. When Noshiko replaced it with a fresh bulb, her fingers also sparked it with foxfire, though she was able to quickly control it, unlike her daughter. Kira looked at her with a shocked expression, but Noshiko simply gave her a look and told her to go to bed once the lamp was returned to normal, leaving Kira to continue to question her supernatural identity and what her mother was hiding from her.
The next day at school, Kira tried to talk to Scott in the hallway, but he was so distracted by the revelation that his best friend Stiles might have the same illness that killed his mother, Claudia that he didn't hear her call out to him. She was then approached by Derek Hale, who assured her that Scott was just preoccupied by other things rather than being mad at her and offered her his assistance to make up for it. When Kira asked her why he would want to help her, Derek explained that he wanted her to tell her everything that happened at the electrical substation when William Barrow kidnapped her. The two then went to the substation together, where Kira showed Derek where Barrow had tied her up. While they were looking around, Derek saw Stiles' aluminum baseball bat magnetically attached to one of the transformers, and realized that a skid mark on the floor was due to the bat dragging along the floor as it was magnetically drawn to the metal transformer. Derek, who was starting to realize what had happened, turned to Kira and asked her to tell him everything she knew about Kitsune foxfire.
That evening, Derek and Kira pulled into the hospital parking lot so that they could join Scott in visiting Stiles, who was in the middle of getting an MRI to confirm a diagnosis of frontotemporal dementia. However, Kira, feeling uncomfortable, informed Derek that she was staying behind. When Derek protested against this, Kira reminded him that they were about to tell Scott that William Barrow was manipulated into discharging foxfire to jump-start the Nogitsune's power inside Stiles, who he was possessing, which led Derek to realize the source of her discomfort and agree that staying behind was probably for the best. She continued to wait in the parking lot until suddenly, she saw a live wire whipping around from the roof before falling toward her, causing her to mutter, "Oh no. Not again" as she watched it head toward her head.
In Letharia Vulpina, Kira was seen dodging the live wire as it fell from the roof of Beacon Hills Memorial Hospital, but when she saw the wire continuing to flip around the parking lot, she immediately jumped into action to try to stop others from getting hurt. Upon seeing an ambulance swerve to miss the wire and running into a fire hydrant that began pumping water all over the tarmac, she rushed forward and told everyone to stay back, just as Allison and Isaac arrived at the hospital to check on Stiles Stilinski. Kira watched in horror as an ambulance driver, a young woman, and Isaac himself were all electrocuted after making contact with a puddle in which the live wire was laying, leading her to run as fast as she could toward the wire, demonstrating her newly-exhibited Kitsune agility by running up the hood of an oncoming car and backflipping off of it before landing in the puddle below.
Knowing instinctively that she was immune to electricity, Kira picked up the wire with one hand and held up the other in preparation to clamp it over the live end, just as Derek and Scott, who had just come down from the roof, ran toward her. Both men watched in shock as Kira touched the live wire with her bare hand and began siphoning the electricity through her palms, causing her irises to glow an orange-gold color. Just as she was almost finished draining the electricity from the wire, Noshiko ran out of the hospital following her confrontation with Stiles/the Nogitsune and saw her daughter using her powers before rushing her away, leaving Derek, Scott, and Allison to tend to the badly electrocuted and burned Isaac. As they were walking away, Noshiko sternly revealed that she had seen what Kira did and scolded her for using her powers in public, claiming that now wasn't the time for other people to know what she is. Despite this, Noshiko would not tell Kira anything else about her powers or her heritage at this point, as they were too concerned with the fact that Stiles and the Nogitsune (henceforth known as Void Stiles) had vanished.
Two days later, Kira met with Scott at school to discuss the Nogitsune, where Kira revealed what she had learned from her research. She explained that Kitsune, including Nogitsune, don't really understand the concept of "good" or "bad," nor do they really want to understand, but they do have their own unique codes of honor and respect, which leads to Nogitsune reacting very badly when they're offended. When Scott asked her what the Nogitsune possessing Stiles could possibly be offended about, but Kira responded that she didn't know, but judging by his actions thus far, it was likely something very bad. Scott and Kira then went to their respective locker rooms to prepare for early-morning cross-country practice, but Scott, Ethan and Aiden were quickly distracted by the sound of one of the Argent family's ultrasonic emitters, leaving Kira to go to practice by herself.
At practice, she realized that not only did she have supernatural-level agility like she demonstrated the previous evening, but she also had super-speed, which was evidenced when she quickly lapped everyone else on the team, including their fastest runner, Danny Mahealani. After the boys had found Stiles supposedly no longer being controlled by the Nogitsune, they figured out that Void Stiles had set up a trap in the woods and rushed toward where the cross-country team was practicing to keep anyone else from being hurt. Scott, with some difficulty, managed to catch up with the extremely-fast Kira, who immediately started babbling excitedly about how quickly she was running. Scott proudly informed her that he could feel how fast she was moving, but then changed the subject to Stiles and brought her with him to return to the others, where they eventually saw Coach Finstock hitting a trip-wire with his foot and getting shot in the stomach with an arrow due to the trap that Void Stiles had set up earlier.
This ultimately led Scott, the twins, and Stiles to leave school, but Kira stayed behind to keep an eye on things. After school let out, she saw her mother Noshiko meeting up with her father, Ken, and watched as her parents walked into Ken's classroom to talk. This led Kira to stand outside the closed door of the classroom so she could eavesdrop on their conversation, though it was clear she didn't understand everything due to how little she understood about Kitsune. During Ken and Noshiko's conversation, Kira learned that Noshiko had nine Kitsune tail, of which she had made physical representations in the form of nine black ceramic daggers called kaiken. Noshiko had also already sacrificed five of her tails to summon the Oni to hunt down the Nogitsune, and Kira watched as Noshiko snapped two more of her tails to create two more Oni to replace the three that Void Stiles had killed, insisting that these two would be stronger because the tails she used were older.
Realizing that the new Oni that Noshiko had summoned would be going after Stiles, Kira immediately left the school to meet up with Scott and Stiles at the Sheriff's station, which was currently in chaos due to a bomb Void Stiles had planted there earlier in the day. Kira caught up with them just after Scott had absorbed the pain of a deputy who literally died in Scott's arms, and she warned them that the Oni were coming and that they needed to get out of there. While driving in the pouring rain in Stiles' Jeep, the three then decided to go to the animal clinic, as the Mountain Ash Alan Deaton built into the foundation would at least buy them some time until the Oni managed to break through it like they did at the McCall House.
However, when they arrived, they were just in the middle of unlocking the door when the Oni showed up, forcing Scott to wolf-out to fight them. Stiles unlocked the door and yelled at Kira to get inside, but she was too distracted with trying to help Scott to hear him. She first started by weakly throwing crates at the Oni in hopes of giving Scott an advantage, but when one of the Oni attempted to attack her, Kira's Kitsune power of instinctive combat skills kicked in, and she reflexively grabbed the Oni by its ninjato and flipped it onto its back. Shocked by this unexpected display of fighting prowess, Kira leaped into the battle with a pipe she had found laying around and knocked another Oni backward with it by hitting it in the abdomen. Suddenly, one of the Oni impaled Scott through the stomach with its sword, and Kira cried out, "NO!" before jump-kicking the Oni backward away from Scott.
Stiles rushed over and helped Kira get Scott inside the clinic before he could be harmed any further. Once inside, Scott leaned against the exam table and nodded at Kira to indicate that he wanted her to pull the sword out of his abdomen so he could finally start healing. However, as soon as Kira had wrapped her hands around the grip and prepared to remove the ninjato, Stiles revealed that he was still being controlled by the Nogitsune when he grabbed Kira by the wrist, yanked it backward, and knocked her out by slamming her head against the table. With Kira laying unconscious on the floor, Void Stiles revealed everything that he had orchestrated that day, including the fact that he manipulated Scott into taking the pain from Isaac, Coach Finstock, and the dying deputy so that he would be able to feed on the pain from Scott himself. However, just as he warned Scott that he shouldn't trust a Fox due to their status as tricksters and began to torture Scott with the sword, Alan Deaton arrived and injected Stiles with a syringe of letharia vulpina, or "wolf lichen," knocking Stiles out, weakening the Nogitsune, and preventing Kira and Scott from further injury.
In Echo House, Kira, feeling guilty due to Noshiko's role in summoning the Oni, offered her assistance in Scott, Allison, Lydia, Ethan, and Aiden's plan to steal the Shugendo scroll, which had answers as to how to remove a Nogitsune from a host and which had been put in an armored truck to be taken to a federal evidence lockup facility with the rest of Katashi's belongings. Though Scott warned her that it would be dangerous, and that anyone who got involved with the McCall Pack inevitably got hurt or worse, Kira insisted that she felt responsible for what was happening to Stiles and pointed out that if she had the ability to help, she should do it. She then explained that she had been picking up sword-fighting skills "scary-fast" before pulling out a ninjato that she had stolen from one of the Oni the previous night, nearly taking Scott's head off in the process due to her exuberance. Despite this initial mistake, Kira showed off her newly-developed skills to Scott, who was so impressed by how her Kitsune abilities gave her intuitive understanding of melee weapons that he instantly accepted her offer of help.
That evening, Scott, Allison, and Kira hid behind a van in the Sheriff's station's parking lot, where Allison used her binoculars to make sure the coast was clear before informing Kira that she was up. Kira utilized her enhanced speed to sprint over to the armored car and place one of the Argents' GPS trackers near the wheel so the pack could track the truck to its location. However, before Kira could run back, Deputy Jordan Parrish appeared to finish loading the truck up, forcing Kira to duck down on the opposite side of the truck. Before the others could even react, Parrish became alarmed when he found that the driver of the truck had been knocked out in the driver's seat and was laying slumped over the wheel with a bleeding hed wound. When Parrish went around to the back of the truck to investigate further, Kincaid, Katashi's associate, appeared and knocked Parrish out as well by slamming his head against the bumper.
After Allison identified Kincaid to the others, Allison and Scott rushed out to stop Kincaid from stealing the Shugendo scroll, which was hidden in Katashi's silver prosthetic finger. Unfortunately for them, Kincaid rolled his eyes at Scott's request to hand the scroll over and Allison's insistence that he could take the briefcase with $150,000 instead, since the scroll was worth over $3 million. When he was also not at all afraid of Allison's crossbow aimed at his chest, Kira, who had climbed onto the roof of the truck, jumped down on Kincaid, wrapping her legs around his neck as she tried to knock him out, only for Kincaid to throw her onto the ground, grab her in a choke-hold, and toss her aside. While Kira recovered from this blow, Kincaid caught the arrow Allison shot before it could hit him and backhanded her in the face, sending her onto the ground next to Kira. Kincaid eventually lost the upper-hand when Ethan and Aiden arrived and incapacitated him, allowing Scott to take the scroll from him. Kira seemed very proud of Scott when he insisted that they let Kincaid live and walk away, as they were there to save a life, not end one.
In The Fox and the Wolf, Kira was summoned to the McCall House by Scott, who had just been visited by Malia Tate after the werecoyote was checked out of Eichen House. Scott showed Kira a katana and a photograph that Malia and Stiles had found with a body buried in the wall at Eichen House, and Kira was shocked to see that the photo, which was dated 1943, was of a woman who looked identical to her, and who was standing with a young Army corporal. Kira assumed that the woman must be her grandmother, which led Scott to suggest that the Nogitsune seemed to be connected to her family. However, before they could discuss it further, Kira got a text from Noshiko telling her that Ken was in trouble and that she needed to get to the high school.
Scott and Kira made a pit-stop at the Yukimura House to grab a vial for Noshiko before heading straight for Ken's classroom, where Noshiko was supporting Ken's body while he doubled over on the floor from being possessed by a Nogitsune fly. When Noshiko asked for the vial of herbs, Kira asked her what they were, and Noshiko briefly explained that they were reishi mushrooms before feeding them to Ken, leading Kira to exasperatedly exclaim that she couldn't believe her mother was feeding her father "magic mushrooms." Once Ken had been cured of his Nogitsune fly infection, Noshiko informed Kira and Scott that the Nogitsune wanted Noshiko's last kaiken, which she stated she had been carrying on her person since Void Stiles' escape from Eichen. Kira, appalled by Noshiko's secrecy, insisted that she needed to tell them everything, and when Noshiko looked hesitant to do so, Scott handed her the photograph and sword Malia had given him earlier.
Noshiko looked at the photo and demanded to know where he had found it, but Kira instead asked Noshiko whether the photo was of her grandmother, forcing Noshiko to reveal that it was actually of her. After briefly explaining her history as a World War II internment camp prisoner through a flashback, Scott pointed out that if it was true, Noshiko must be nearly 90 years old, and when Noshiko wryly admitted that she was actually closer to 900, Kira was visibly stunned by this revelation. Though she was slightly reassured by Ken's insistence that he was only 43, she was still more determined than ever to learn the truth about her mother's background and connection to the Nogitsune. Noshiko picked up the katana and carried it over to to Ken's desk, where Kira, Scott, and Ken gathered around to watch Noshiko unsheath it, revealing a handle and a blade that had been shattered in over a dozen pieces. She explained that the blade had broken the last time it was used, which was against the Nogitsune in 1943.
Kira and Scott went on to listen to Noshiko's story at Oak Creek internment camp, where Noshiko, ever the trickster, stole food and supplies for her fellow internees and fell in love with the medic, Corporal Rhys. Noshiko attempted to put all of the broken pieces of the katana blade in order to repair it, and insisted that Kira needed to help her, because there wasn't much time left and it was a task that needed to be completed in daylight. Unfortunately for Noshiko, Kira refused to do so until Noshiko told her and Scott everything about what was happening, leading Ken to agree with his daughter and insist that Noshiko give them the information they needed. Though Noshiko ultimately agreed to tell her story, she was still skeptical of Kira's involvement with Scott, as she insisted that Foxes and Wolves tend not to get along, and not just in fables and stories.
When Noshiko explained more about her relationship with Corporal Rhys, Kira cut her off and insisted that neither of them were interested in her "Casablanca story"-- what they wanted to know was how to save Stiles. Noshiko assured her that she was trying to tell him, but neither Kira nor Scott believed her, with Scott pointing out that she was stalling for time, since the Oni would once again be going after Stiles when the sun went down. Kira and Scott refused to believe that their only option was to kill Stiles, but when they asked if Noshiko could call the Oni off, she insisted that once they heard the rest of the story, they wouldn't want her to. Meanwhile, at the Argent Apartment, Allison, Chris, Derek, and Sheriff Stilinski were discussing their own plan to capture, but not kill, Void Stiles, and Derek assured them that both Kira and Scott were in the middle of trying to stop the Oni at the source.
During Noshiko's retelling of her story, she got so upset at the memory of finding out that the camp doctors and MPs were stealing important medications for the campers and selling them on the black market, she accidentally squeezed a shard of the katana blade in her hand so tightly that she cut her palm open. Kira was immediately horrified and asked her what she did, but she was stunned into silence when Ken handed Noshiko a tissue, which Noshiko used to wipe up the blood before revealing that her hand was totally healed. When Kira demanded to know how she did that, Noshiko informed her that, as Kitsune, it was one of their gifts, and that Kira had to have noticed by now that she never gets sick, which is due to her accelerated healing and perfect immune system gained from her Kitsune heritage. This gave Noshiko a segue to tell Kira and Scott about the riot at Oak Creek, which occurred after the loss of medications led to dozens of deaths from pneumonia, including a young boy named Michio.
When Noshiko detailed the riot, which led to even more deaths at the hands of the MPs who shot at the Japanese internees, it was revealed that Noshiko's good friend, Satomi Ito, who was interned at Oak Creek with her, had been bitten and turned into a Werewolf like Scott, which ultimately led her to accidentally kill Corporal Rhys with a Molotov cocktail when MP Merrick pistol-whipped her across the face and caused her to transform during the riot. Kira was horrified by this revelation, as well as the fact that Noshiko herself nearly died after being shot dozens of times in the riot and was believed to be dead by the doctors. It was because Noshiko was so hurt that she prayed to their Kitsune ancestors for kitsune-tsuki, or possession by a Fox spirit, so that a powerful Nogitsune who fed on chaos, strife, and pain could possess her body, giving her the power to heal and take revenge on the camp, since she had since learned that the riot and subsequent deaths would be covered up by the US government.
Kira, now genuinely curious, asked Noshiko what happened next, forcing an emotional Noshiko to confess that since trickster spirits can have very dark senses of humor, the Nogitsune she summoned ended up possessing Rhys' dead body rather than Noshiko as she had planned. It was this mistake that caused the Nogitsune to descend on the camp and kill all the survivors of the riot, both the American soldiers to the Japanese/Japanese-American internees alike. While she finished the story, Noshiko insisted that Kira hurry in helping her reassemble the sword, since night was coming.
After Noshiko told them about how she and Satomi worked together to force the Nogitsune back into its fly form and trap it in a jar, she reminded them of a French lesson she had given Rhys in 1943 about the idiom "Coup de foudre," which can mean "bolt of lightning" or "love at first sight," before explaining that what they needed now was a literal bolt of lightning. When she went on to say that the blade was shattered by the Nogitsune, but Kira could put it back together, Kira asked her why she couldn't just do it herself, leading Noshiko to reveal that Kira was a Thunder Kitsune, unlike herself. Noshiko went on to ask her if she trusted her, but Kira insisted that since she just learned that Noshiko is 900 years old and had lied to her her entire life, she wasn't sure she would be able to trust her ever again. Noshiko insisted that Kira trust her on this and took her by the hand, pushing it so that Kira's flat palm was hovering a few inches above the blade. With Noshiko's guidance, Kira's ice-blue foxfire shocked the blade and magically reforged it with the electricity running through it.
Once the blade was repaired, Noshiko held it out, handle-first, so that Kira could take it, informing her that her own power now belonged to Kira. When Kira pointed out that she might not want it, Noshiko insisted that she needed it and tossed her the sword, which Kira easily caught and spun in the air by reflex. Noshiko smiled and reminded Kira that it gave her balance before pointing out that her power now belonged to Kira, and that if the Oni weren't strong enough to defeat the Nogitsune, she would need to do it herself, even if it meant seeking out a Wolf to help her. Both Kira and Scott became angry at these words, and when Scott pointed out that Noshiko hadn't told them anything, Noshiko made it clear that their only option to save Stiles was to kill him. Despite Noshiko and Ken's protests, Kira and Scott insisted that there had to be another way to save him before they left to go track down Stiles, who had left a message for Sheriff Stilinski that indicated he would be at Derek's loft.
In The Divine Move,