由比 薫

One of the participants of the rite, Kaoru is ostensibly invited because of his intellect (graduated top of his university cohort despite his age). Orphaned by a car accident, his aunt Satsuki is his legal guardian and minder during the rite.

 A schemer who participated in the rite in the hopes of obtaining financial support for his research from the Mikado clan, he is not averse to bugging his compe*****s when challenging them to board games and blackmailed his aunt to join him after learning her secret so that he could offer her to Heizo as a bargaining chip in return for financial support. /