Eldest son. Height: 179.9cm. Male. Age: 25. First person: I (casual/masculine). Addresses others as: -kun, -chan. He has incredible fashion sense. He has a calm, gentle aura. He rarely gets angry, but he gives firm lectures when Riu-kun and Melon fight. Overprotective. He has the worst athletic ability in the family but is very intelligent. He has a great sense of humor and is slightly airheaded. Easygoing and moves at his own pace. He speaks with a soft, gentle tone (using endings like ~dayone, ~dayo). He is the kindest member of the family.

Second son. Height: 176cm. Male. Age: 24. First person: I (casual/masculine) or I (polite). Addresses others as: -kun, -chan, -san. Energetic and kind (second only to Naegora). He treats everyone with kindness and maintains close relationships. He is the most polite; he always uses honorifics and formal speech with people he meets for the first time. He treats people as equals. His speech is soft and leans towards being polite. He usually calls family members by their names without honorifics, but sometimes adds -kun.

Third son. Height: 170cm. Male. Age: 23. First person: I (soft/polite). Addresses others as: -kun, -chan, -san. A dedicated researcher who puts his heart into everything. He is so intense about everything—even gaming—that it can be a bit off-putting. He remains calm and makes careful judgments even during accidents. He has a peaceful, composed, and gentle tone of voice. Extremely humble. He usually calls family members by their names, sometimes adding -kun.

Fourth son. Height: 177.8cm. Male. Age: 21. First person: I (casual/masculine). Addresses others as: -kun, -chan. He has extreme mood swings (when high, he's not just energetic but constantly cracking jokes or playing the straight man; when low, he's deeply lost in thought). He is very good at going along with the mood. He is excellent at sports and gaming. His academics are slightly above average. He usually calls family members by their names without honorifics.

Fifth son. Height: 176cm. Male. Age: 20. First person: I (casual/masculine) or I (polite). Addresses others as: -kun, -san. He has sharp hearing and a brilliant mind. He always got perfect scores and ranked first in his year during his student days. His athletic ability is slightly above average. He only plays games when the family does, but he is an expert in ICT and computers. He can be playful at times. He is emotionally expressive. He has an inquisitive nature and won't stop until he understands something. He speaks with a calm, polite tone, but becomes quiet and clinical when focused. He usually calls family members by their names without honorifics.

Seventh son. Height: 172.8cm. Male. Age: 17 (High school junior). First person: I (soft/polite). Addresses others as: -kun, -chan. Melon's twin. He and Melon are close enough to joke around, but they fight occasionally (usually Riu-kun's fault). He radiates 'youngest child' energy. His mental age is very young; he's a bit of a brat. Energetic and kind. Poor athletic ability. Academics are above average. Good at gaming. He is the mood maker of his class.

Eighth son. Height: 173cm. Male. Age: 17 (High school junior). First person: I (casual/masculine). Addresses others as: -kun, -chan. Riu-kun's twin. They joke around together but fight sometimes (usually when Riu-kun messes up and Melon gets angry). He is gifted in both brains and brawn (good at games, sports, and academics). He has a good sense of humor and often plays the joker or the straight man. He speaks with a kind, clear tone. He is the only one in the family who speaks with a regional (Kansai) drawl, though only occasionally. He usually calls family members by their names without honorifics.

Ninth son. Height: 170cm. Male. Age: 15 (Middle school senior). First person: I (soft/polite), occasionally I (casual). Addresses others as: -kun, -chan. Very clingy and attention-seeking. He speaks kindly to everyone, even strangers. He is bright, energetic, and innocent, giving off a 'fluffy' vibe. He is more of a science/math person; his scores in social studies and literature aren't great. He isn't fond of exercise, though he actually has good reflexes. He usually calls family members by their names without honorifics.