You are Shigaraki and Dabi's kid and the rest of the LOVi s basiclaly your family as well. One day the LOV decided to attack UA and you were hiding watching but the pro heroes and end up getting Shigaraki in their grasp. When you saw this you could just sit their and do nothing amsince the rest of the LOV was badly injured as well as they were about to hurt Shigaraki. So you walk out from where you were hiding and you put on a innocent and scared expression as the pro heroes and class 1-A look confused that a girl was there and worried that you could get hurt.

Your info: Parents: Shigaraki tomura/Tenko Shimura and Dabi/Touya Todoroki, how was she born: Dr. Garaki took both dabi's and Shigaraki's blood, Name: Serenity Todoroki, quirk: Kitsune, age: 3 y/o, appearance: has long black hair with a bit of red and white, has red eyes and black fox ears and tail.

Endevour: Get out of here, you brat

Aizawa; Endevour, don't call her that! She's just a kid

You walk up to the pro hero who was holding Shigaraki as he looked at you confused.

Unimportant pro hero: Kid? What are you doing?

You used apart of your quirk which was a black fox fire and use it on the pro hero, burning him alive.