Background info: They are the girls who hardly listen, and don't wear the uniform. They're in class 1-A, along with your oc.

Shinari: (quirk: unknown, works exactly like all for one) them...

Aizawa: *activates his quirk* "Everyone, stay where you are"

*runs after them*

*once he leaves the classroom, he can see the two girls talking with villains Shigaraki, Dabi, Toga, and Twice*
Koru (right): "What are you doing here, you guys?"
Toga: *hugs her* "Good to see you too, Little Sis Phoenix"
Shoraya (left): *hugs Shigaraki* "Seriously, what are you guys doing here?"
Dabi: "Came to check in on you guys. Where's Shoto?"
Koru: "Still in class"

*gasps* Todoroki Touya, Shimura Tenko and Toga Himiko.

Shoraya: *her ear twitches and she turns around* "Hi Shinari!"

Ah! I-invisibilty quirk! *activates a (weak) invisibility quirk, making him transparent*

Shoraya: "Koru..."
Koru: "Got it."
*Shoraya lets out a deep breath, and Koru flaps her wings, blowing it forwards. Shinari's feet are frozen in place*

...*deactivates quirk *

Shoraya: "Alright." *the ice melts off his feet* "I'm Shoraya, but just call me Kai. This is Koru"

*nods* and I already know them three...and about h i m

*Koru and Kai are about to walk into a purple and black portal*

Wait.

*Koru steps out of the portal, but her wings are bigger and darker, no glasses, and her eyes are a piercing yellow. Kai's ears and hair are pitch black now, her eyes and markings on her face snow white* "It's nice to be back." *Koru goes to sit with Toga, taking a little knife out of her pocket and cleaning it.*

...

Koru: "Fair enough"

*looks around at the people and surroundings*

Koru: "He has a point...you guys should leave. Touya, I'll say hello to Shoto for you."
Dabi: "Alright..."
Shigaraki: "Fine...Kurogiri." *a purple and black portal appears, and the villains walk through*
Toga: "Bye, Little Sis Koru"
Shigaraki: "Come visit us soon, Kai"
Shoraya: "Alright"
Koru: "Bye"

...

*he can see the base of the League, and Shoraya hugging Shigaraki* "Sorry we didn't come sooner, bit of a run-in with a few criminals on the streets. They've been taken care of, though" *she turns to see if Koru is coming, and Shinari can see blood on her face* "Hi Shinari!"

*nods*

Koru: "Let's get back to class."

Hopefully Aizawa didn't see me slip out

Koru: "Oh, hi."

...let me come with you.

Shoraya: "Come on" *she runs into the class, followed by Koru"

*walks after them*

Kai: "So, why'd you wanna come her Shinari?"

*here*

I needed to learn.

"Oh, sorry." *she wipes off the blood, and Shinari can see her ears and hair are darker than normal.*

*just begins looking around*

*Koru is talking with Aizawa, blocking you from his line of sight. Kai looks at you and nods*

*walks in and heads to his seat at the back*

Koru: "....thank you Sensei." *Kai and Koru walk back to their seats*

*in silence*

*class ends and the girls are the first to get up*

*heads straight to the dorms*

*before he enters he can see Kai and Koru are walking to the side of the building*

I'm going to regret this.... *follows them*

Koru: "Sorry about that."
Shoraya: "Just...don't tell anyone"

...I don't...................I can keep a secret.

"Alright." *she holds the portal open, letting him walk through*

...thank you..*cautiously walks through*

Shigaraki: "No. Like Touya said, we came to check on our siblings."

They'll find you. The heroes.

Koru: "Okay"

I suppose you're here to attack?

Skull: *quietly summons his axe of skeletons*

Aizawa: *activates his quirk* "Everyone, stay where you are"

Skull: ugh...

*Aizawa looks at a blond haired boy and green haired boy fighting, walking over to the to break up the fight*

Skull: ?