Replying...
Intro. You are erasermic biological child (can be boy or girl) you were their golden child until Eri and shinso came along, you understand they've been through stuff but it still hurts. Eri and shinso get all the love and then you only get the scraps. You were born while aizawa was doing his female to male Transition when they were 19.

Erasermic family

@Suriamy