The impeccable butler who follows Diavolo around as if he were his shadow. His ability is to see both the past and the future.

Barbatos has a very calm demeanor, although he does enjoy lightly teasing other people. He is nice towards MC and often saves leftover sweets he bakes for them.

Barbatos takes his position as a butler very seriously. He even teaches the demon brothers intricacies about his job. The demon brothers believe that Barbatos could do anything.