Kaiwan

Kaiwan (嵬腕) is one of the four guardians that guard the entrance to the Seireitei. He is the guardian of the Blue Stream Gate(Eastern Gate). Aizen hypnotized him and the two other guardians so he can use them to give trouble Ichigo and his friends. But he was stopped by Jidanbō Ikkanzaka and Kūkaku Shiba. He appeared only in the manga.