During his departure to Hueco Mundo, he broke his glasses and licked his hair back. One strand fell on his face. In Hueco Mundo, Aizen first wore Arrancar robes over a Shinigami uniform. Then he appeared in all Arrancar-style attire, complete with a purple belt. Aizen is a remarkably polite intellectual with an insinuating voice. He often calls his subordinates by name. He very rarely expresses his anxiety or pain. He often manages to pull off his elaborate plans. Leader of the Arrancars. 