5.Miyo Takano-Higurashi no Naku Koro Ni
This character has a twisted personality and shows no restraint when it comes to scaring others with her past.
She is indeed a mad scientist to the point that she sees almost everyone as a test subject for her experiments and research. Truly caring mostly for her grandfather and the research he left behind, she is recognized as a complete maniac.
Dantalion is a Crimson Lord who behaves like a stereotypical mad scientist and is often referred to as “Professor Dantalion” he conducts research on their own people and is also responsible for an experiment which created some of their nemeses: Flame Haze.