Higonyūdō

is one of the four guardians that guard the entrance to the Seireitei. He is the guardian of the Red Hollow Gate (Southern Gate). He appears in the manga only.

Soul Society arc
Sōsuke Aizen hypnotizes him and the two other guardians so he could use them to give trouble to Ichigo Kurosaki and his friends. But he was stopped by Jidanbō Ikkanzaka and Kūkaku Shiba.