149cm, 11th grade. A high school girl with a brown bob and green eyes. She has a cute appearance! Her birthday is October 22nd. (She's the older sister, born just one day before Gen.) She loves onigiri. (Especially plum and bonito flakes.) Her favorite snack is steamed buns. Her specialty is shredding cabbage, and her hobby is budget cooking. She gained four younger brothers through her mother's remarriage. She is currently living with the four brothers. She has a bright and energetic personality and has had a strong sense of responsibility since childhood. She wants to be a reliable older sister. She is in the same class as Gen at school. She doesn't really have much of a sense of personal space with others...

The eldest son of the Narita family. His birthday is October 23rd, just one day after Ito's, making them the same age in 11th grade. He is a 'cool beauty' type with silver hair and navy eyes, standing 184cm tall. He seems to be quite popular. He is in the same class as Ito at school. He looks cold and blunt, but he actually treasures his family deeply. He has a terminal case of 'eldest son syndrome.' Currently working part-time at a restaurant! Since his hobby is muscle training, his specialty is crushing apples with one hand. He says he wants to be born as a rich family's cat in his next life... He likes food with shrimp and hard senbei (rice crackers). His specialty dish is gyoza, but he always burns them (...). Lately, he seems to live for the fun of teasing Ito...

The second son of the Narita family. 10th grade. He is 181cm tall and a handsome boy wearing glasses. He has calm brown hair and silver-blue eyes. His hobby is reading, and his specialty is karaoke. He likes cup ramen, madeleines, and financiers. He says he wants to be a whale in his next life and swim the world. He often says things only geniuses would say and helps Ito with her studies; he's very intelligent! He occasionally plays pranks on Gen, saying it's because he gets worried as a younger brother when he sees Gen acting immature for his age... He's a subtly sly gag character. Though he seems lighthearted, he appears to be a warm person at heart.

The third son of the Narita family. He is 158cm tall and has been living as a shut-in (hikikomori) since 8th grade. He has blonde hair long enough to cover his eyes and purple eyes. He very rarely leaves his room and focuses on playing games in his room. His birthday is June 24th. His hobbies are gaming and drawing, and his specialty is identifying family members just by the sound of their footsteps...! He seems to like mayonnaise, potatoes, and gummies. He hates tomatoes. He says he wants to be a hero in a 2D world in his next life. He is prone to tears. He often has his hoodie pulled up. He usually lives with his door closed. He says he's scared of talking to strangers. A 'shut-in angel'—he is a kind and good person at heart. However, his self-esteem is very low. The game he enjoys playing is 'Final Hunter.'

The fourth son and youngest of the Narita family, in 3rd grade. He is 144cm tall, and his birthday is March 8th. He has a cute appearance with blonde hair and green eyes. His hobby is YouTube, and his specialty is being very social. He is extremely active. He likes strawberry shortcake and pudding. He wants to be a dinosaur in his next life. (Tyrannosaurus, Brachiosaurus, etc...) He hates green peppers. Since his biological mother passed away when he was just a baby, he might be holding things in all by himself. (To the point where he doesn't even realize he's holding back.) Perhaps because of that, he sometimes acts spoiled, throwing tantrums or asking for hugs. His dream is for the family to live happily. He is currently raising a large frog named 'Gomes.'

The biological father of the four brothers, who remarried Ito's mother. (His first wife died of illness.) Currently transferred to Hokkaido for work with Saho. He treasures the children deeply and is very family-oriented. He also seems to cry easily.

Ito's biological mother, who remarried Isao. She also treasures the children deeply and seems to have a personality prone to tears. She is currently in Hokkaido with her husband. A woman with light brown hair and green eyes. She has a youthful face.

A classmate in the class Ito transferred into. They became close very quickly from their first meeting. She seems to be an extrovert. A high school girl with light brown hair and pale orange eyes. 11th grade.

Like Rio, she is a classmate in Ito's transfer class and became friends with Ito from the first day. She also has a kind personality. An 11th-grade girl with an orange pixie cut and yellowish eyes.