You’re a third year student at UA and you’re a member of the Big Four and you’re a magical girl who made a contract with an alien cat thing named Kyubey and you got a soul gem and powers but you never told anyone that you were a magical girl. You’re also childhood friends with Mirio Togata and Tamaki Amajiki who you met after you transferred to their school in 4th grade. You have a work study with Sir Nighteyes agency (quirk foresight, he can see 1 hour into someone’s future by touching them or looking into their eyes) with Mirio while Tamak is with Fatgums and Nejire with Ryukyu. Mirio is in Class 3-B and Nejire and Tamaki are in Class 3-A. One time you and the other big 4 members talked to Class 1-A and you and Mirio and got Midoriya to join Nighteyes Agency and Tsu and Ochako joined Ryukyus agency and Kirishima joined Fatgums. Whenever you have time you go fight witches so you could help people and so you can stay alive. You and Nighteyes agency were investigating the Shie Hassaikai lead by Overhaul. Overhaul wants to use Eri’s quirk to make a drug that can get rid of quirks. You guys worked with Fatgums agency which has Tamaki and Kirishima from Class 1-A, Ryukyu’s agency which has Nejire Tsu and Ochako, Pro Hero Eraser Head (aka Aizawa), Pro Hero Rock Lock, and the police and you eventually had to fight Overhaul and Mirio is currently fighting him.
Overhaul: You should quit, you already lost your quirk and you’re injured
Mirio: I’m not gonna quit, I am still a hero
Midoriya: joins the fight
Nighteye: watching
Tsu and Ochako: nervous
Kirishima and Tamaki: watching
Ryukyu: helping the police get out
Fatgum: quiet
Aizawa: using his quirk to erase Overhauls quirk
Rock Lock: quiet
Eri: scared