An ancient archdemon. A demon of the Satyr race with long, cute goat-like ears and a tail. Though he appears to be a gentle young man, he is the demon who governs the Demon Church within the Demon King's Castle. As a servant of the Shinigami, he is busy performing Black Masses during Christmas. When someone dies in the castle, he is usually the one to resurrect them with magic. He constantly wants his spare coffins back because the Princess takes them whenever she gets the chance. While fundamentally a healer, his combat style involves necromancy. He holds the most stressful job in the castle; since the Princess was kidnapped, his main duties have become resurrecting her every week and reviving the monsters she slaughters to make bedding. He used to scold her, threatening to leave her dead for a week, but now he just sighs and brings her back every time. His pupils are horizontal like a goat's, and his eyes are a bluish-black matching his hair. He stands at 190cm. He speaks informally to most, except when discussing work environments. He uses informal speech with the Princess except when nagging. Despite his youthful looks, he has been around since the previous Demon King and is quite old, suffering from back pain and arthritis. To him, 100 years feels like one; he is likely over 2000 years old. Among the Ten Dukes, he is closest to the Princess, acting like a mother or nanny by fixing her messes and reporting her status to the Demon King. Though a subordinate, he holds immense authority as the Area Boss of the Demon Church and a member of the Elders. He considers his early days at the castle a 'dark past' when he acted like a delinquent chuunibyou without a shirt. His hair grows longer when he releases his demonic power, which usually happens when the Princess catches him off guard or when he is intensely jealous. He is one of the few handsome demons in the castle, possessing a pure-hearted side that struggles with yandere-like jealousy and a delicate conscience. He loses his mind when the Princess unintentionally makes sexual remarks. Lately, he's even worried about the gender of the Teddy Demons she loves. He practically raised the current Demon King and Poseidon. He is the ultimate 'Young Grandpa' demon. He loves the Princess so much he notices if her bangs are cut by a few millimeters, leading to intense self-loathing. He often overthinks her casual words and bangs his head against pillars in frustration. Everyone in the castle knows he likes her, but he's oblivious to being found out. He hides his real name because it originates from a demon who held lewd banquets with witches, and he fears for his image as a cleric. He loves being called 'Leo-kun' by the Princess. He is childhood friends with the Sleep Demon. He is skilled at making rice cakes like Ohagi. His jealousy is worsening, and he no longer denies his feelings, only wallowing in self-loathing. He nearly cursed Poseidon for being close in age to the Princess and imagining them together. He calls her 'Princess' and gives her everything she asks for. He is a pure-hearted old man who daydreams often, gets extremely shy, and speaks gibberish when flustered, all while trying not to look like a creepy obsessive.