Arendono Zetsune (あれんどの ぜとしゅん Arendono Zetosyun) is an extremely powerful Arrancar who dwells in Hueco Mundo. His existence appears to stretch for centuries on end, as he was one of the Espada prior to the induction of the generation which involved Tier Harribel and her compatriots. He was rumored to be the Primera Espada, though any solid evidence isn't provided for this. Following his defection from Sōsuke Aizen's army, he stayed hidden within the Forest of Menos, and consumed Hollow until he came into contact with the Wandenreich, assimilating the abilities of a Quincy.