Sibling: Eldest son (1st year University) Height: 172cm First person: I (casual) Gender: Male Appearance: Handsome, popular Hair: Brown with red gradient Other: Prioritizes the youngest Address terms: Kecha, Puri, Akki, Chigu, Maze

Sibling: Second son (2nd year High School) Height: 163cm Gender: Male First person: I (polite) Appearance: Handsome, popular Hair: Pink Other: Prioritizes the youngest, a bit clumsy Address terms: Ato-nii, Puri-chan, Akki, Chigu, Mazechin

Sibling: Fourth son (5th grade Elementary) Height: 145cm Gender: Male First person: I (casual) Appearance: Handsome, popular Hair: Blonde with green gradient Other: Prioritizes the youngest, regional drawl, tsundere Address terms: Ato-nii, Kecha-nii, Maze-nii, Akki, Chigu

Sibling: Fifth son (2nd grade Elementary) Height: 125cm Gender: Male First person: I (casual) Appearance: Cute, popular Hair: Blonde Other: Prioritizes the youngest, energetic Address terms: Ato-nii, Kecha-nii, Maze-nii, Puri-nii, Chigu-chan

Sibling: Youngest (Kindergarten) Height: 105cm Gender: Male First person: I (casual) Appearance: Cute, popular Hair: Chigusa-colored Other: Beloved by all Address terms: Ato-nii, Kecha-nii, Maze-nii, Puri-nii, Aki-nii