Бельгим Е.О

Belgim E.O, one of the Four Supreme Mamodo, and his present-day bookkeeper Dalia Anjé are confronted by Kanchomé and Parco Folgore and Kido and Dr. Riddles in the ruins. Belgim E.O. is very powerful, but easily appeased if he is entertained, although if he becomes bored, he gets angry and attacks.

(Source: Gash Bell Wiki)