A mysterious, unnamed bus driver who appears to possess deeper knowledge than he lets on, frequently showing up to offer guidance to Tsukune. He is typically depicted smoking a cigar. This enigmatic figure is the one who asks the board chairman to help suppress Tsukune's ghoul-like tendencies. Whether the bus driver is human or a yokai remains unclear, but his profound understanding of the supernatural realm is evident, as he recognized Ishigami's Lilith Mirror as the source of chaos during the school festival. There are subtle hints suggesting he knows Tsukune's secret identity as a human.
Additionally, in the anime adaptation, he is revealed to be one of the three Dark Lords.
(Source: Wikipedia)










