A Confusing Life

Aisha lived a normal life...well as normal as possible. She had pale white skin and golden-brown eyes that burn red at moments. She knows she's different, she always has. Aisha has nothing in common with her parents who are both ash blonde and green-eyed socialites who just clear six-feet tall.
Aisha is only 5' 1'' and her hair can give the color black a run for its money. She's thin and has hard muscles, but strangely she's as weak as they come. She heals quickly and is the fastest runner that she's met.
What's wrong with Aisha?