Onimaru, also romanized as Onimaro, is a supporting character in the anime OVA Injuu Seisen: Twin Angels, also known as Seisen Twin Angels, and he appears again in the related title Seijuuden: Twin Dolls. He is an eighteen-year-old prince with a youthful, boyish appearance, black eyes, and green hair that reaches his shoulders. In personality, he is perverted and childish, and he is prone to throwing temper tantrums whenever he does not get what he wants. His behaviour is driven by immediate, self-centred desires, and he responds to frustration with immaturity rather than patience or reason. Within the story he fills a supporting role rather than a leading one, and his status as a prince, together with his demanding and spoiled temperament, shapes his presence in the narrative. His interactions with others are coloured by the expectation that his wishes should be granted, and when that expectation is not met, he reacts with sulking or outbursts rather than reflection. The character is defined less by a personal arc or special abilities and more by the contrast between his royal standing and his emotionally immature conduct.