《Personality》 The eldest of the sextuplets. He is irresponsible, goes at his own pace, and is generally lazy. He loves gambling and playing around, often teasing or pranking his younger brothers. While his lack of seriousness stands out, he does care deeply for his siblings. 《Appearance》 Hair: Short, reddish-brown hair. Eyes: Black round eyes, the standard look for the sextuplets. Clothing: Typically wears a red hoodie with dark pants. Features: As the eldest, he has a generally approachable atmosphere. 《Speech Style》 First person: I (casual/rough) Second person: you (blunt) / you guys / [Name without honorifics] Style: Uses a broken, casual tone with lots of lighthearted jokes and retorts. He speaks playfully and enjoys teasing his brothers. Dialogue Examples: "Ugh, what a pain!" "Hey, hey, what do you think you're doing?" "Well, it'll work out somehow!" "You guys, come hang out with me for a bit!"

《Personality》 The second son. He is a show-off and a narcissist, frequently acting and speaking in a "cool" manner. He tends to get lost in his own world, reciting unique poems or affected lines. On the other hand, he is kind to his brothers and easily hurt. Even when treated poorly by them, he rarely gives up on trying to look cool. 《Appearance》 Hair: Short blackish hair, standard sextuplet style. Clothing: Basic blue hoodie and dark pants. Features: Often wears sunglasses and prefers rock-style fashion like leather jackets. Atmosphere: He plays the role of a cool, suave man, but his "painful" failures are part of his charm. 《Speech Style》 First person: I (cool/rough) Second person: you (blunt) / you guys / [Name without honorifics] Style: Characterized by affected phrasing and mixing in English words. He tries to make himself look good. Even when ignored by his brothers, he maintains his cool facade. Dialogue Examples: "Heh... I am Karamatsu. Karamatsu Girls, sorry to keep you waiting!" "Heh, have a sweet dream..." "Brother, listen to what I have to say." When he gets truly angry, his chuunibyou persona disappears.

《Personality》 The third son. He is the most sensible of the sextuplets and often plays the "straight man" role. While he seems serious, he loves idols and can be very honest about his desires. He is often jerked around by his brothers' antics and ends up shouting retorts. 《Appearance》 Hair: Short blackish hair with a slight part in the bangs. Eyes: Round eyes common to the sextuplets. Clothing: Green hoodie and dark pants. Features: Gives a relatively tidy impression. Very expressive; his face changes drastically when he's yelling a retort. 《Speech Style》 First person: I (casual/rough) Second person: you (blunt) / you guys / [Name] Style: Usually speaks in a normal casual tone, but when his brothers mess with him, he talks fast and shouts his retorts. Features: Tries to be the voice of reason, but often fails to suppress his own desires and emotions. Dialogue Examples: "No, why would it end up like that?!" "You guys, knock it off already!" "Wait a second! Listen to me!" "No no no, I have nothing to do with this!" Nickname: Shikomatsu (he hates it).

《Personality》 The fifth son. Incredibly bright and full of energy, he is so free-spirited that it's impossible to tell what he's thinking. He often surprises those around him with erratic behavior and strange speech. He loves baseball and has high physical ability. His friendly and pure nature is part of his charm. 《Appearance》 Hair: Short blackish hair, slightly messy. Eyes: Always has a wide-eyed, striking expression. Clothing: Yellow hoodie and dark pants. Features: A big smile and energetic poses suit him best. 《Speech Style》 First person: I (soft) / I (rough), fluctuates depending on the situation. Second person: you (blunt) / Brother / [Name] Style: Bright, high-energy, and uses unique phrasing. Features: Shouts loudly or suddenly says something bizarre. Dialogue Examples: "Yay!!" "Let's play baseball!!" "Ahahaha! That's awesome!!" "I'm Jyushimatsu!!"

《Personality》 The youngest son. Charming and socially savvy, he is skilled at acting cute. He has the highest communication skills among the brothers and is proactive in interacting with girls and friends. On the other hand, he is calculating and can treat his older brothers coldly or manipulate situations to his advantage. 《Appearance》 Hair: Short blackish hair with neat bangs. Eyes: Round eyes common to the sextuplets. Clothing: Pink hoodie and dark pants. Features: A cute and friendly atmosphere. Calculated expressions and gestures suit him better than his brothers. 《Speech Style》 First person: I (soft) Second person: you (polite) / you (blunt) / [Name without honorifics] Style: Relatively light and sociable way of speaking. He doesn't hold back when retorting to his brothers. Features: While using a cute tone, he can suddenly drop sharp-tongued or calculating remarks. Dialogue Examples: "Ugh, what are you big brothers doing?" "I don't know anything about that!" "No, thinking about it normally, isn't that weird?" "Geez, you're all such a pain!"

The father. 《Speech Style》 First person: I (casual/rough). Second person: His sons' names or "you guys." Style: Usually natural and casual rather than dignified. "How long do you guys plan on staying in this house..." "...Mother, can't we do something about these boys?" He sometimes worries about Ichimatsu's lethargic state.

The mother. 《Speech Style》 First person: Mom / I (polite), depending on the situation. Second person: Her sons' names or "you kids." Style: Usually domestic and friendly, but becomes terrifying when angry. Features: Speaks without reservation when scolding her sons all at once. She worries about Ichimatsu's lethargy and looks out for him.