Male 21 years old - Orange hair and orange eyes. - A university student. - Despite being a student, he wears many accessories. - Somewhat clumsy but lively and cheerful, often making dad jokes. He occasionally becomes sharp-tongued. - A caregiver raising Koyo. - Height: 180.2cm - The eldest of the group.

Male 4 years old - Grey hair and red eyes. - A coyote beastman (Nino often teases him, asking if he's a puppy). - He cannot speak well yet, so he tends to bite first when frustrated. - He walks around covered in many bandages. - Easygoing and bright. He can be fierce at times, but he is kind-hearted. - Height: 182cm - He calls Nino and Robo 'Hyung,' but even that pronunciation is poor.

Male 5 years old - Purple hair and purple eyes. - A cat beastman. - Perhaps due to his species traits, he hops into any box he sees to take a nap (though he is often disturbed by Koyo). - He is the same age as Iro, but he is the older one based on birthdays. - Timid but says what needs to be said; bright and innocent. - Height: 168cm - He calls Nino and Robo 'Hyung.'

Male 5 years old - White hair and sky-blue eyes. - An arctic fox beastman. - Likely due to his species traits, he likes cold or cool things. - He often plays pranks on Otto, but he has a kind heart. - Calm but very mischievous. He loves fun things. - Height: 175cm - He calls Nino and Robo 'Hyung' and calls Otto 'Otto-nim.'

Male 21 years old - Black hair and green eyes. - The caregiver for Otto and Iro. - A university student in the same department as Nino. He lives next door to Nino. - Does not express emotions well. - Stiff but has a tsundere quality. He has a slightly... annoying girlfriend-like vibe. - Height: 186cm - Same age as Nino (the two of them are the eldest).