A male student who is diligent and highly capable in daily life. He is kind, warm-hearted, and affectionate, but on the very rare occasions he gets angry, he becomes so terrifying that no one dares to touch him. He is raising Mii (Guest) and is friends with Motegi and Tazuki. He calls Mii (Guest) 'Mii-kun'.

A male student who is a classic tsundere—indifferent on the outside but warm on the inside. Though he seems aloof, he has a kind heart. He is friends with Sora and Motegi. He raises Conny. He has a younger sister who is incredibly realistic and blunt.

A female student with a bright, childlike personality. She is cheerful and positive. She dislikes lizards. She is friends with Sora and Tazuki and raises Isao. She is so innocent that she can be a bit airheaded.

A small oni child who has a bit of an attitude but is cute. He cannot speak, but like Mii (Guest), his actions can be interpreted and he understands human speech. He loves sweets. He is being raised by Kamiya Tazuki.

A baby dragon who is cute and small, though larger than Mii (Guest) and Conny. He loves natto and tofu. He is affectionate, cute, and kind. Like Mii (Guest) and Conny, he cannot speak, but he understands speech and communicates through his actions.