Again this is when Void Stiles is still causing terror and the Nogitsune is controlling Stiles and he visits Ken Yukimura, Kira's dad. For those who don't know who that is, Kira is Scott's girlfriend and Scott is Y/N's brother.
~Author's Pov~
A Saturday evening at Beacon Hills High School, Ken gets an unexpected visit in his classroom. He places the book he was holding down on the desk he was behind with a loud thud. "Coming in on a saturday, now that's dedication," Void says to Ken, as loud and slow footsteps follow, almost echoing through the empty classroom. "Where is she hiding them?" Void says boldly with no sense of doubt in question as he walks to the shelf of books to the right.

"I'm sorry I don't know what you're talking about." Ken says,  clearly lying.

"Little knives," Void says as he pulls a few books from the shelf, making them fall on the floor "daggers?" he says pulling more books. "You know what they are," pulling more. "Physical representation of her tails." He says, catching Ken off guard as he flinched and Void pulls the last book with a loud thud "How ever the heck that works." Void says as Ken relaxes a little.

"Maybe you'll like to do some reading on it." Ken says, panicking a little as Void is starting to make his way over to him. "I could direct you to the section on japanese myths in the library." he says with a worried look on his face. A venomous smirk appears on Void's face.

"Nah, i'd like to talk to you," He says, making his way forward slowly, tracing his fingers along the desks. "The older the tail...the stronger the Oni," He says, still walking forward. "I'm I right?"
"And now there's one left and that one is the strongest."

"Unfortunately, I don't know what you're referring to." A dangerous smirk appeared on Void's face, as he made out a small laugh, shaking his head.

"You'll talk." Ken looks at him, swallowing hard as he looks down. Void let's a little fly make it's way to Ken's mouth(ewww, that cannot be sanitary, this actually happened, not making this up). Ken gasps as he holds his neck choking.

Void gives a sickening smile and looks him in the eye. "They always talk."

~Back in the McCall's house~

Scott and Kira are in Scott's bedroom, sitting on his bed. "She looks just like me," Kira says, holding a photo that had 1943 written on the back. "This has to be my grandmother." She says checking the photo out.

"Remember how I told you about Malia, she's the last one who saw Stiles at Eichen House." Scott says. "This picture and this," he says holding a katana/sword (donno what it's called).

"They found those with a body buried in a wall." Scott says. "The same backwards five the Oni put on us, was on the wall." Scott says as Kira is a little surprised. "It sounds like this all goes back to your family, your grandmother, your mom."

"I guess it made sense," she says. "By the way, is Y/N still coming to Beacon Hill?"

"Unfortunately yes, very bad timing." Scott says sighing, "wish she would just listen." Kira's phone rings as she gets an urgent phone call.

Can y'all guess who it's from, lol. Anyway, I will explain some things. This can be hard to understand for those who don't watch Teen Wolf. Don't worry I will update the second chapter tomorrow. Expect a second chapter. Ok.

Eichen House- is a mental health treatment facility in Beacon Hills California. It was first Introduced season 3 when William Barrow was a patient there, and when Lydia Martin used her Banshee abilities to try and find Stiles Stilinski while he was sleepwalking Season 3 episode 18.

William  Barrow- William Barrow was a minor character and antagonist in the second half of Season 3 of Teen Wolf. He was first introduced as a patient at Eichen House who had been held there ever since he blew up a school bus at Beacon Hills High School with a shrapnel bomb several years prior to the start of the series. The bomb killed four students and left a fifth with no legs, and it was reported that, every day, he promised his psychiatrist that when he got out of Eichen House, he would do his bombing "right" this time; he was also known for ranting and raving about children with "glowing eyes," suggesting that he had experience with supernatural creatures at some point in his life. Some time after the Nogitsune's release from his prison within the roots of the Nemeton, the Void Kitsune used his specialized flies to use a limited form of possession on Barrow, allowing him to essentially control the mass murderer and make him do whatever he wanted. He took advantage of Barrow's fear and distrust of supernaturals and sent him after Kira Yukimura, believing that this would cause Scott McCall and Stiles Stilinski(the latter of whom the Nogitsune was possessing) to come rescue her, which would then lead Barrow to trigger Kira's foxfire, electrocuting Stiles and thereby jump starting the Nogitsune's power inside of him.

Zoopathy- Zoopathy, also known as Animal Manipulation, is the supernatural ability to control other animals. This power can affect a wide range of potential subjects, as potentially any of the hundreds of thousands of species could be manipulated by the user. However, those who possessed or gained this power in the series have only been shown to manipulate one type of animal at a time, and can sometimes only manipulate one type of animal in general. Which is what happened with Ken and Void.

Nemeton- The Nemeton is a significant location in Beacon Hills that has had a major role in Season 3 and Season 5 of Teen Wolf. It was originally an ancient tree in a grove in the Beacon Hills Nature Preserve that was chosen to be the consecrated sacred meeting place for the Druids who lived in the town. They built a root cellar in the ground below the tree and painted a five-fold knot at the base of the roots to indicate that it symbolized the world tree. It was believed that any harm that came to the Nemeton would cause the surrounding towns and villages to suffer from plagues, strife, and other kinds of natural disasters. The Nemeton contains powerful magic that is only vaguely understood, and it gains its power from ritual sacrifices that occur at the tree or on the telluric currents that run through it. The wood of the Nemeton has been used to create powerful objects, such as the Triskelion Urn that contained Talia Hale's claws. At some point, the tree was cut down by an unknown person, but the stump still retained a small spark of power, which increased in strength when a virgin sacrifice was inadvertently performed at the roots in the early 2000s. It has since been reawakened by the surrogate sacrifice ritual.

Lydia Martin- Lydia Martin is a main character and the current female lead of Teen Wolf. She is the daughter of Natalie Martin and Mr. Martin, and the granddaughter of Lorraine Martin and her wife Maddy. She is also the best friend of Stiles Stilinski, Scott McCall and Malia Tate. When first introduced, Lydia could be as described as a shallow, vain, mean-girl who played dumb to hide just how smart she really was. However, after she became friends with Allison Argent, Scott McCall, and Stiles Stilinski, Lydia began to shed this persona and has since grown into a brave, compassionate person who genuinely enjoys helping others who are struggling, particularly those who have been traumatized by the supernatural like herself.

Banshee- In Teen Wolf, Banshees are women who have the supernatural power to sense and predict when someone is about to die. As a result, they are considered harbingers of death and are often referred to as the "Wailing Women" due to the fact that they unconsciously scream to announce when someone has died, usually those killed by supernatural forces, though their scream can also be used for other purposes.

Malia Tate- Malia was born to the Werewolf Peter Hale and the Werecoyote assassin known as the Desert Wolf, but ultimately inherited her mother's supernatural genes by becoming a Werecoyote herself, unintentionally taking a portion of her mother's power while she was being born. However, upon realizing the Desert Wolf's resentment toward her newborn daughter for taking her powers, Talia Hale initiated the Alpha memory-manipulation ritual to take Peter's memories of conception and birth before stealing Malia and putting her in the adoption system to get her away from The Desert Wolf. Malia was then subsequently adopted by the Tate family, who raised her as their own alongside their younger biological daughter on a ranch in Beacon Hills.

Nogitsune- Nogitsune was a major antagonist in Season 3. He is a Void Kitsune who feeds on chaos, pain, and strife. He was first mentioned by Katashi in Silverfinger when Chris Argent, Allison Argent, and Isaac Lahey came to him to ask him about the Onidemons who had recently come to Beacon Hills. Katashi explained that the Oni were hunting a Nogitsune, or a Void Kitsune, by examining every supernatural creature they came upon to make sure they hadn't been possessed by the dark Kitsune in question.

Kitsune- Kitsune are a supernatural species of Japanese fox spirits that are also commonly referred to simply as "foxes." They are creatures who live for many centuries.

Kira Yukimura- Kira Yukimura is a recurring character in Season 3 and a main character in Seasons 4 and 5 of MTV's Teen Wolf. She is the daughter of the human history teacher Ken Yukimura, and the 900-year-old Celestial Kitsune Noshiko Yukimura. Kira's parents moved to Beacon Hills, California in the fall of 2011, where she enrolled at Beacon Hills High School. Unbeknownst to Kira at the time, her family really moved to Beacon Hills so that Noshiko could kill a powerful Nogitsune that she summoned in 1943, who had been released from its mystical prison several weeks before their arrival.
Kira soon discovers that she, too, is a Kitsune—specifically a Thunder Kitsune, one with control over both electricity and foxfire

Noshiko Yukimura- He is the human husband of the ancient Celestial Kitsune Noshiko Yukimura and the father of the young Thunder Kitsune Kira Yukimura. He was first introduced in Season 3 as the new history professor at Beacon Hills High School who was replacing the recently murdered Mr. Westover after the Yukimuras moved to Beacon Hills from New York City.

Ken Yukimra- She is the wife of Ken Yukimura, the mother of Kira Yukimura, and a former internee at the Oak Creek Internment Camp during World War II. She was first introduced in Season 3 as a stay-at-home mother who had just moved with her family to Beacon Hills from New York City.

Ask anymore questions you have and I will try my best to answer.