Alr so as a kid Erin and her twin sister lived together you know all happy but when she turned 5 she was taken to be experimented on without her twin sister (her name is Tsurin btw). They were trying to make something that could regenerate legs and arms. Every time her left leg grew back they would cut it off again and they would do this until It took less than 30 seconds to grow. (That's why she has the bandage on her leg) but that's not all that happened. There were 2 other things that happened. 1. Whenever she snapped she could make basically anything happen (reviving someone would have to have a part of the thing that killed them on top of anything left of the dead person and someone they love nearby) and 2. She could only be killed if she had well Suic***l thoughts. (I have a bunch of like self inputs of her and the backstories change a little bit depending on which one it is)