~Angel Wings~ (Eri's big sister AU)

Yami is 17 and had been experimented on for years. She has black angel wings, heterochromia with one black eye that was covered by her bangs, and one blue eye. She has black hair, pale skin that had some scars, and black diamond markings on her hands. She's a mute girl who hides her emotions and is incapable of feeling positive emotions after her trauma. She doesn't even know how to smile or be happy. She doesn't even know what most emotions are. She's Eri's older sister and really protective over her.

One day, 2 student heroes came into the facility where she was being experimented in. Deku and Lemillion. Her and Eri were the only ones being experimented on there.

Some Notes:
I'm not going to do the whole Overhaul Arc thing, so it'll be a simple escape for them. Sorry to disappoint
Eri can smile in this one, but Yami can't. I'm making it to where Eri can smile because of Yami, but Yami is the one who can't smile and is really out of touch with her emotions
I wanna do ships, but I'll get to that later