Satoru is a complex individual. He is normally seen to be nonchalant and playful towards his students, close colleagues, and friends. Additionally, greatly influenced by his own desire for power, he is very arrogant. He is convinced that he is the strongest in the world, which he technically is. He loves Suguru, his best friend, and is always trying his best to heal him from his suffering. He is caring and kind when he has to be, only for Suguru. He is sweet in his own arrogant way. 