Kyōgoku appears as a white-haired man, dressed in torn traditional kimono set. He dons a red mask on his head (possibly symbolizing his role as the 'demon'). He also wears a pair of circular framed glasses.
He is thoroughly disliked by Ayatsuji, who always laughs at him in return. He uses a good-natured, old-fashioned tone of voice that adds to his stench. He has a unique philosophy and acts according to it. He has followers and supporters all over the place, and has a mysterious charisma that attracts them and follows his orders and words. Naturally, he knows a lot about ghosts, and the idea of the supernatural.
Kyōgoku's ability, An Inherent Drop (憑き物落とし, Tsukimono-Otoshi?), or Exorcism allows Kyougoku to give someone a 'demon' which then alters their mind/spirit.
Kyōgoku has a record of thirty eight (38) counts of instigation to murder, twenty-nine (29) of extortion, and hundreds of charges for robbery, abduction, and assault - tempted or not. However, Kyōgoku did not directly do these crimes but used someone to commit them.