INFINIT

Infinit — a person born once in a hundred years and possessing a limitless supply of energy and superpowers. 

For the people of Earth 2, Infinits are a kind of deity.
Not much is known about them, because many died at a young age, not having coped with their power.
Main character, Iso, has to choose whether to return to her old life and forget about what happened or to start playing by the rules of the new world.