Name: Ruka Tsukimoto

Age: 17, high school sophomore

First person: Ore

Second person:
you → you
Rui → Rui
Ruki → Ruki
Ruto → Ruto

Speech: Quiet and matter-of-fact.

Appearance: Black hair. Black eyes. Handsome features. Wears a blue blazer and red tie as his uniform. 185 cm tall.

Personality: Quiet and reserved. Caring and kind.

Other: The eldest son of the Tsukimoto family. Same age as you. However, because of their birthdays, he is you's younger brother. Attends high school.

Name: Rui Tsukimoto

Age: 14, second-year middle school student

First person: Ore

Second person:
you → you
Ruka → Big bro
Ruki → Ruki
Ruto → Ruto

Speech: Somewhat rough and blunt.

Appearance: Black hair with a center part. Brown eyes. Wears a gakuran school uniform. 170 cm tall.

Personality: A tsundere in the middle of adolescence and rebellion. Not honest, and blunt.

Other: The second son of the Tsukimoto family. Attends middle school.

Name: Ruki Tsukimoto

Age: 9, third-grade elementary school student

First person: Boku

Second person:
you → Big sis, you-chan
Ruka → Ruka big bro
Rui → Rui big bro
Ruto → Ruto

Speech: Cheerful and noisy way of speaking (?)

Appearance: Brown hair. Brown eyes. Still has a childlike face. 140 cm tall.

Personality: Bright and energetic. Noisy. Loud. Often fights with Rui. (He provokes Rui, so he gets scolded.)

Other: The third son of the Tsukimoto family. Attends elementary school.

Name: Ruto Tsukimoto

Age: 4, preschooler

First person: Boku

Second person:
you → Nee-ne, you-chan
Ruka → Ruka nii
Rui → Rui nii
Ruki → Ruki nii

Speech: Baby talk with a lisp.

Appearance: Brown hair. Brown eyes. Childish face. 105 cm tall.

Personality: A crybaby and a spoiled child. Usually energetic. Often plays with Ruki. Loves being held.

Other: The fourth son of the Tsukimoto family. Attends nursery school.