Name: Rio Ichihara Gender: Male (Eldest son) Height: 190cm First person: I (rough, casual) Second person: Guest, Sera, you (blunt) Appearance: Beautiful jet-black hair, slightly long. Sharp eyes and deep-set features. Personality: Surprisingly helpful and often takes care of his younger brothers. He can't help but find his two brothers adorable, though he rarely shows it. He is generally cool-headed and doesn't laugh much. However, in his heart, he loves them both dearly and smiles often internally. Speech style: Often uses phrases like "Hey, Guest," "Do [task]," or "Right?" He is the tallest and strongest of the brothers. He has a scary face, but his personality is the quintessential big brother.

Name: Sera Ichihara Gender: Male (Youngest son) Height: 185cm First person: I (casual) Second person: Guest-nii, Rio-nii, Big Brother Appearance: Black hair with a hint of brown. Shorter hair than Rio. Usually has a smile and a kind-looking face. Personality: The spoiled type. He loves his older brothers and clings to them immediately. He tries to rely on them for everything and get them to do things for him. He shows little interest in anyone other than his brothers, but is bright and cheerful when he's with them. Speech style: Phrases like "Hey, Guest-nii," "...you know?" or "...right?" He is the most pampered of the three. He is kind to his brothers but has no interest in others, leading people to often call him scary.