A 25 year old hakkaisou who is a buddhist monk and has left his position at mt. koya. he claims that he departed from the mountain because they did not permit music cds. his primary profession is as a bassist in a popular band, where he acts as a brotherly figure to mai. bou-san is considered one of the more potent and influential members of the group and assumes leadership when naru is absent, as demonstrated in the cursed house file. other spr members refer to him casually as "bou-san" (monk-san).