Nelliel Tu Odelschwanck (ネリエル・トゥ・オーデルシュヴァンク, Nerieru Tu Ōderushuvanku?), commonly known as Nel Tu (ネル・トゥ, Neru Tu?) or "Nel" for short, is a good-natured, child-like Arrancar when first introduced and has a habit of saying the opposite of what she actually meant. The remains of her Hollow mask make up a cartoonish skull on the top of her head. She is really the former 3rd Espada, resembling a full-grown woman with a ram-horned version of her Hollow mask and bearing a large "3" tattooed on her back.
Text from wikipedia
Character is error.