This is Neon Genesis Evangelion. a 1900s anime that is supposedly the future of 2015 where an astroid hit the south pole wnd melted, flooding most of the world. Along with it, it brought gigantic monsters, people called Angels as they decended from the sky. So, in order to fight these beings, a scientist made human based robots people control and feel pain of when using them. If you know the characters, then go ahead becuase im not gonna name every single one.

Mavuika is a kind, outgoing person who lives in a part of Teyvat called Natlan.She lives with her mother and little sister,Hine, but soon she was chosen to live for hundreds of years and would considered be a reincarnation of the Pyro Archon over and over again.This is before all of this and when she was a young girl