Basara Toujou (東城 刃更 Tōjō Basara) is the main male protagonist of the series. He is an ex-member of the Hero Clan after a terrible incident where his unique power went out of control and left along with his father. Basara soon lives in the Toujou Household with Mio Naruse and Maria Naruse, whom he vowed to protect as their older brother.

Basara is soon revealed to be a three-bred as the son of Jin Toujou, the hero who also drank the blood of Fafnir; Sapphire, the previous Demon Lord's Sister; and Raphaeline, a member of the Ten Gods.