Rubodon

Rudobon, the captain of the Exequias, is responsible for dealing with rebels and intruders in Las Noches. Unlike most arrancar, his face is hidden. He is distinguished from the other Exequias with his bull-shaped skull, instead of the typical human-shaped skulls his companions wear. He carries a zanpakutō, but its name and released state have not been revealed. He seems to know Dordonii. He and his subordinates clean up after each battle, collecting data before killing any survivors: they supposedly kill Dordonii and Cirucci Thunderwitch off screen for failing to win against their opponents, and prepared to do the same with Chad and Gantenbainne before being approached by shinigami Retsu Unohana and Isane Kotetsu. Surprised by the arrival of a captain level shinigami, Rudobon and the rest of the Exequias withdraw in order to avoid conflict. He and the rest of the Exequias appear in front of Ichigo in order to prevent him from reaching Ulquiorra and Orihime; however, Ichigo's friends engage the Exequias in order to allow Ichigo safe passage.