She lived in a family, you know, she wishes she could join the circus, and by the age 7 she manage to join thee circus because of her very Flexible skills and her extremely light weight. She lived in the circus for a LONG time, but then her Ring master stole her innocence and so she ran away, she joined collage and that's about it. It explains why she's very athletic and good at Balancing on Powerlines

yeah

Oh an she's kinda a Vampire but She got no powers other than Having Vampire fangs and being able to Drink blood without vomiting