Tatsuya Eldest son, 23 years old. He mainly does live streaming, utilizing his naturally good voice and talkative nature, and sometimes drags Daisuke into it. He treasures his brothers more than anything and watches over them closely. He's a bit of a playboy. However, his cooking is disastrous, and he has zero life skills. Apparently, he has no intention of moving out yet (and since he can't take care of himself, he couldn't anyway). He rarely shows weakness to his brothers, but he relies on Hikaru and is easily seen through by Ryota. Sometimes he stays out all night or gets drunk and tries to hit on his younger brothers. He keeps saying he'll get his driver's license but never does. He did, however, buy a car that can fit all the brothers.

Daisuke Second son, 21 years old. University student. An anime otaku who works part-time at places like Animate while aiming to become a voice actor. Bright, loud, and high-tension. He loves his brothers even more than anime and is always the life of the party. However, he is still terrible at tidying up. He is particularly close to Ryohei, despite their opposite personalities. He tries to preach the gospel of anime to Raul but is stopped by Ryohei and Ren, and ultimately gets gracefully ignored by Raul. He often tries to show Ryota his adult doujinshi, which makes Shota absolutely furious. Lately, he's been dragging Ryohei along on various trips.

Shota Third son, 20 years old. University student. A beauty enthusiast and a germaphobe. A tsundere with a sharp tongue, but he occasionally shows a clumsy kind of kindness. He's a bit of a playboy. However, his life skills are even lower than Tatsuya's, so he leaves almost everything to Ryota. He gets along best with Ren and Tatsuya. Despite appearances, he cares about Ryota the most and dotes on him obsessively. Because he was bored, he had Hikaru do some DIY work to connect his room to Ryota's room next door.

Hikaru Fourth son, 19 years old. University student. He loves muscle training, but in reality, he's terrified of horror and bugs, has a massive sweet tooth, and collects Sylvanian Families—a huge gap in character. However, in a physical fight, he's the strongest in the family. His moods are easy to read. He begs Ryota for homemade chocolate and eats it looking very happy in secret. Despite his looks, he has the gentlest way of speaking among the brothers and is quite cute. He is the only one among the brothers who has a driver's license.

Ryohei Fifth son, 18 years old. High school senior. A high-spec guy who is the student council president, excelling in both academics and sports. A serious hard worker, but he also has a cheerful side where he calculatedly plays a 'cute' character or shows no mercy with his sharp tongue toward Daisuke and Tatsuya. He is closest to Daisuke. He dotes on Koji, but Koji responds with a tsundere attitude. He teaches Raul very carefully, and Raul has grown up to be quite bright, but it seems he can't compete with Ryota's natural airheadedness. Lately, he's been stressed with university entrance exams; while he complains about being dragged around by Daisuke, it also helps him cope.

Koji Sixth son, 16 years old. High school freshman. The mood maker, who for some reason speaks with a regional Kansai drawl. He's always in charge of the laundry and can cook too. He's like the sun, making everyone smile. However, he's lonely, a crybaby, and craves attention. He's always with Ryota, and they have conversations like a comedy duo. He often pesters Ren and gets treated as a nuisance. For some reason, he's tsundere toward Ryohei. He's always making noise with Daisuke. He's a scaredy-cat; when he gets frightened at night, he often goes to Hikaru's room, and the two of them shiver together. A boy in the middle of puberty.

Ren Seventh son, 15 years old. Middle school third-year. In the middle of a rebellious phase. Cool and taciturn, but also a bit of a klutz, airheaded, and moves at his own pace. Since he's mostly only ever been picked on for fights and only knows how to handle that, he doesn't know how to act spoiled. Right in the middle of puberty. Like Tatsuya and Shota, he has zero life skills, so he can't stand up to Ryota. He looks cool, but he secretly dotes on Ryota. Recently, he's started developing a sadistic streak toward Ryota—a handsome guy with way too many character traits.

Raul Eighth son, 13 years old. Middle school freshman. Pure and like an angel. Thanks to Ryohei's elite education, his sharp tongue is starting to develop. He has sparkling eyes and tries to use them to win Ryota over, but it doesn't work on Ryota at all, which makes him panic. He has a brother complex. A terrifyingly beautiful boy who is fully aware of his own cuteness.