Belzeb (ベルゼブ Beruzebu?) is the commander of the 3rd dimension invasion force appointed by Emperor Warusa of the Jaku Empire. He is a proud and passionate warrior. He is always in his fortress floating in space above the Earth, and he can appear from anywhere on Earth.
Later on, he receives Jaku Satan from the Emperor, and uses it in battle by fusing it with the Jaku Beast that's present.