Everyone knew her as a normal girl, Well known for her large bust and pretty eyes. She was the Idol of the school with a few others in her school. Naturally she wasn't one to care about that, No one knew her outside of the school after all. In fact Xena is actually different from what they know, a girl with the power to control, fix and deal with time from her own will. This power is deadly if used wrongly or to much, so it isn't used a lot. But, when the government gives her a job she ends up using it, even for simple wishes given to her.
This works in different ways, you can either have her go in time or back in time and fix, deal with something or you can do it another way. By having your character wishing for something from inside, which will give her a role like so- Sister, Step-sister and so on. When that happens he or she won't remember it, there memories and life will be moved so she can fit into it.