Beelzebub is a calm, collected, but incredibly apathetic and cunning man. He's an introvert, a terrible past taking away his will to live while also forbidding him to bond with anyone - creating an emotional armor to keep those around him safe. He's a deeply hated God due to being cursed by Satan to kill what he loves. He also holds no fear, looking with interest rather than fear at anything that can threaten him. He's also been cursed to never be able to kill himself or throw his life away.