Matanza Mascarada

Matanza Mascarada (たいりょうさつじぎそう; lit: Bloodbath Masquerade) is Espade Cero, formerly Segunda after Barragan. He takes control of the Hueco Mundo shortly after Aizen's capture and Hollow Struggle of Power. Matanza manages to end the reign of Tier Harribel when she took over. He killed the Espadas, 6, 3, and eventually 1. He unofficially declared himself Cero, even though his number still remains 2.

Appearance
Matanza is a tall, slender Arrancar with the remains of his mask being his black eyepatch.