Hansel's sister is a character from the Brothers Grimm fairy tale 'Hansel and Gretel'. Her name is Gretel, which can be spelled with either 6 or 5 letters. She is the daughter of a poor woodcutter and her brother is Hansel. In the story, she and her brother are abandoned in the forest by their father and stepmother, and they must find their way home. Gretel is brave and resourceful, and ultimately saves both herself and her brother from the evil witch who lives in the forest.