Name: Nicole Jones. (isn't her name so original?)
Alias: Silent Knight.
Nickname: Dick calls her "Domino" because of her hair.
Looks: Long black hair with white bangs and 2 white streaks.
Clothes: civvies; Blue short sleeve shirt, jeans, blue converse, and a black leather jacket. Hero costume; black half domino mask, black full body suit, with white gloves that go up to her elbows, white boots that stop at her knees, and a white cape.
Relationship to team: Batman's Niece.
Personality: Dark and brooding just like Bats. (Just kidding! Okay maybe a little.) Smart, energetic, tough, doesn't take no for an answer, curious.
Powers: Harmonic voice, whenever she sings "silent night" it puts her enemies into a deep sleep, super speed, expert hacker.
Weakness: If she doesn't eat anything every 6 hrs. o shorter her super speed begins to deteriorate. o threaten to kill Batman and Robin.
Past: After a head on collision that killed her parents an younger sister, Bruce took his niece in, after wondering where her uncle disappeared every night, and letting her curiosity get the best of her, Nicole found her way into the batcave. After Bruce refused Nicole to get into the life of fighting crime, she threatened to tell his secret to the world. Now, she is keeps her lips sealed and is training to be as powerful as her uncle.
I'll put a picture of her up tomorrow. :)