EDIT: He is not an AV character anymore, so this is not fanart
LOL it's Nanghaithya Bosatsu!!
Bosatsu is "boddhisatva", which, as I understand it, is some kind of holy person in Buddhism. Ironic because Nanghaithya is a demon.
Chinese text says "Om Mani Padme hum" in Chinese, however it is pronounced, and the red seal is my Chinese name.