Much, much better. I do want you to extend on her appearance and personality, try to make your character more fleshed out.
For personality, you could say: KAy is a very nice and outgoing person . She loves to be around people, but she does have a temper. SHe tends to care more about herself tha nothers. She hates it when people put her down, but she also tends to be judgemental herself.
Give me some pros and cons. Make me think that this person is living and breathing.
For appearance: You could say: Kay is tall and stands at about six feet four inches. She is slender, and has plenty of accentuating curves. Her hair is long, and rests at her tailbone. It is black with white high-lighted tips. HEr eyes are green, and are very doe like. The make her have an air of innocence. She has no visible scars or scrapes as of yet.
One other thing, characters do not get their powers until they are 18, so you will have to change that in your history.
Other than that, great start. Don't copy everything I said though, just use it as a reference okay?