Kaidou Seiji

He was secretly raised by powerful people in the underworld through the and eventually rose to the top of the organization, becoming the worst and worst conductor.

Although he has a very strong sexual desire, he also has the rationality to carefully pursue and kill his prey.
Even though he is the top of the organization, he never lets go of his job of securing female slaves through his duties as a conductor, and leaves all the complicated matters to his partner Takatsuki and other trusted members of the organization.