she has Five guardians One for each of the five elements and has their own special powers/quirks . And because of this she has one of her own, known as "Call" and "art". All these makes her and the others unable to die of anything other than old age. She can "call" one or all of then at a time and take on a version of them. But depending on who and how many, will differ the time from a short time to a long one. 

NOTE; tell me what you think. but keep the bad words and "being mean just cause" to yourself.