Hitomi Fujihara

(Hitomi: 瞳 "pupil of the eye". It can also come from 智 (hito) "wisdom, intellect" and 美 (mi) "beautiful" Fujihara: "wisteria meadow" (藤原))

Appearance: Long, black hair and red eyes

That's Hitomi. Actually, that's not her real last name, it's the name of her guardians. She has no idea what her real last name was or who her real parents were. When she was a baby, her brother brought her to her "parents" and begged them to help her. He also told them her real parents were dead. She was three months premature and barely alive. In order to save her life, her "mom" (who just so happened to be an expert at medical jutsus) performed an aging jutsu on her. However, this jutsu only worked in 5-year increments, so she went from a newborn to a five year old in about an hour (and gained the skills to walk, talk, etc). As soon as he was sure she would be ok, her brother left. He told her "parents" it was better if he wasn't around and warned them to keep her away from Konoha. So she lived with her new parents in their house in Suna.