Name: Alluka "Nanika" Li
Age: 12
Appearance: 
[img=http://images5.fanpop.com/image/photos/29400000/Alluka-Nanika-hunter-x-hunter-29447395-600-800.jpg]
Bio: Both of Alluka's parents died, and her uncle kicked her out of the house. Since then she has not had a home, though before she was a hard worker, and had many part time jobs.
Power: If you grant her three requests then she will grant you any one wish. There are many rules for this ability. After three request her eyes turn black and then you ask her for your wish.
[hider=Rules]-If someone fails to Alluka's requests and gets killed, the difficulty level of Alluka's requests returns to level 1. That is the best time to make a wish.
-If Alluka is making requests from a particular person, they cannot be moved over to another person mid-way. -Therefore if that particular person disappears such as concealing themselves, Alluka is unable to make requests to anybody else.
-If the person fulfilling requests dies mid-way, it will count as a failure and at least one more person will die.
-Alluka cannot make requests of someone without knowing the person's name.
-The same person cannot ask Alluka for consecutive wishes,
-While Alluka can grant only 1 wish at a time, one can give Alluka several conditions to a wish, therefore greatly expanding the capacities of what one can ask of Alluka before granting another 3 requests.
[/hider]
Other: When her eyes go black she is called Nanika

I based her off of Alluka from Hunter X Hunter, so if your confused about her ability you can google it