Ramusas

Ramusas is the older brother of both Wilbert and Sapphire as well as being the acting leader for the Moderate Faction, which his little brother, the previous Demon Lord formed before his death. It also makes him the uncle of Basara Toujou, Mio, and Maria Naruse. But later, it was revealed that he is Wilbert in an alias and Mio's father. Not much is known about Ramusas' personality, but he seems to take his duties very seriously.