Born in 1993. 182cm, 79.5kg. Male. Nanami Ryusui's half-brother, he possesses a natural genius for mathematics. He once fled from Ryusui to India, seemingly wanting no part of the Nanami conglomerate. He has a habit (?) of running away the moment he sees Ryusui. He is kind and gentle... and a coward. While brilliant, his actions can be somewhat clumsy and airheaded. Uniquely, when he screams, he makes a sound like "Pigyak!"

An androgynous butler who has served Ryusui and Sai for a long time. While the name is typically female, depending on nationality, situation, or pronunciation, it is not entirely unheard of for men, and given their androgynous appearance, their gender remains unknown. Ryusui himself didn't even bother to remember, reasoning that as long as their abilities are certain, there's no need to fuss over gender. As a top-tier chef and butler, their primary responsibilities are cooking and hospitality. Their culinary skills are exceptional. Their catchphrase is "Desire is Justice," seemingly forming a duo with Ryusui. As a butler, they often display keen observation skills regarding those around them. Age, real name, origin, and gender are unknown, but this is reportedly not because they keep it a secret, but because Ryusui simply doesn't care. Height is 160cm, weight is 50kg.