Thread:Jester of chaos/@comment-30744559-20171114175916/@comment-4708882-20171114205555

Possibly Zouken Matou though three others come close. It's hard but Zouken won slighly due to his short screen time and maybe pissing me off a little more.

Zouken - An elderly mage obsessed with immortality and adopts one little girl just to experiment on. He brags she screamed for three days and forces one of his relatives (who tries to save the girl) to eat a worm to gain power while boasting that said worm took the girls virginity. He's done this to his own family and seems to enjoy it. The worms are very disgusting for reasons it's on his page.

Shidou - A woman wanting immortality that killed people who failed her, stole their work to sell, made clones of herself to be used for experiments and to extract their eggs to make a drink and even when Fran shows progress she tries to have her killed.

Ernst - A fanatic who wants to wipe out all Demons (these include plenty of friendly one), demanded his daughter when she got pregnant and when she refused tries to have her burnt at the stake. She escapes and he sends people to kill her and the newborns only to keep them alive in case he needs them. He's killed plenty by burning and anyone who stood in his way.

Michael - A mad scientist who serves a Demon (who finds him cruel) and seeks to perfect an elixir for immortality. He brutally tortured one mother, kidnapped her daughters, killed a person who tried to save the kids after saying she could live if she recited their creed, drugged and brainwashed many tourists to experiment on, shows no actual loyalty to the boss only an obsessive crush, is sexist, makes a somewhat perverted comment at a teen saying her body matured and threatens to experiment on her little sister if the older one refused or if said experiment didn't get the results he wanted.