Mr. Oga

Oga Tatsumi is an adult male with black hair and glasses. He is the protagonist of the anime series Beelzebub. Oga is a delinquent who is feared by everyone in his school. He is strong and has a bad temper. One day, Oga finds a baby on the steps of his school. The baby is actually the son of the demon king, Beelzebub. Oga is forced to take care of Beelzebub and protect him from other demons who want to kill him. Oga is not happy about this at first, but he eventually grows to love Beelzebub and becomes a good father figure to him.