Beelzebub  

Bee-yan, ベルゼブブ

Azazel's childhood friend is a fly demon who resembles a bird and feeds on feces. He possesses an ability known as Divulgence which enables him to force others to reveal their true selves, ranging from unveiling their hidden sides to causing them to defecate involuntarily. Additionally, he can use goat dung as a performance-enhancing drug, increasing the potency of his attacks. In the third OVA, it is revealed that his full name is Beelzebub Yuuichi.