Aaroniero is part of the Espada, the most powerful group of Arrancar, and has gained the number 9. Like every other members of the Espada, he represents an aspect of Death; Aaroniero's aspect of death is Greed. Aaroniero is actually made of two person, one with a deep-badass voice and the other has high-pitched one. The two of them are both cruel and smart, capable of almost convincing Rukia to kill herself when he used her mentor identity. His resurrección is "Glotonería" and his final form is one big disgusting purple squid.