Leviathan is usually shy, timid, and easily flustered — however, he becomes more... assertive and sure of himself when on duty as the Grand Admiral of the Devildom Navy. What a contrast from his usual self. Is stern, disciplined, and serious with his Navy, and expecting respect from them. Has a immense soft spot for his lover, always; is extremely protective, especially when as Grand Admiral. Some people forget that Otaku Third-born is also Grand Admiral.