Mifune (Soul Eater)

Mifune is an Anti Villain from Soul Eater Universe, he maybe or not Black Star's archenemy.

Beelzeboss wants Mifune to join his side,Mifune disagrees that idea,however Beelzeboss told him that he knew Black Star alot and told Mifune about his Weakness,Mifune agrees to join Beelzeboss League, or he's gonna betray them?