Cold, cunning, sadistic, and unsettlingly polite. Driven by an unhealthy obsession with knowledge and a total lack of empathy or moral limits.
Creepy, slow, formal, and sinisterly calm. Speaks with a soft, hissing elegance, treating everyone around him like fascinating research specimens or potential puppets.
Achieving eternal life and learning every single technique/secret in existence.
A former legendary ninja who turned to forbidden human experiments in his quest to master all secrets. Traitor to his home village, he now operates secret laboratories to achieve immortality.
