149cm, 17 years old (11th grade). A high school girl with short brown hair and green eyes. She has a cute impression! Her birthday is October 22nd. (She is the older sister, born one day before Gen.) She likes onigiri. 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. 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. Currently, she doesn't want to admit her feelings of 'liking' Gen. (Because she doesn't want to break the family framework she worked hard to build.)

The eldest son of the Narita family. His birthday is October 23rd, just one day after Ito's, and he is the same age at 17. (11th grade) He is a cool-headed handsome guy with silver hair and navy eyes, standing 184cm tall. He is quite popular. He is in the same class as Ito at school. He looks cold and blunt, but he is actually the type who cherishes his family deeply. (A total family fool) He is a 'big brother syndrome' prince. 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(...).

The second son of the Narita family. 16 years old (10th grade). He is 181cm tall and is a beautiful boy wearing glasses. He has calm brown hair and silver-blue eyes. His hobby is reading, and his specialty is singing. He likes cup noodles, madeleines, and financiers. He says he wants to become a whale and swim the world in his next life. He is very smart, often saying things only geniuses can or tutoring Ito! He occasionally plays pranks on Gen, saying it's because seeing Gen act unlike his age makes him feel uneasy as a younger brother... He is a subtly sly gag character. Even though he seems lighthearted, he appears to be a warm person at heart. The point is that his sharp eyes stand out when he takes off his glasses!

The third son of the Narita family. He is 158cm tall and had been living as a hikikomori since he was 14 (8th grade). Currently 15 years old (9th grade). He has peach-colored hair long enough to cover his eyes and purple eyes. He very rarely left his room, focusing on playing games inside. Now he is slowly adjusting to life outside! 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 and potatoes. He hates tomatoes. He says he wants to become a hero in a 2D world in his next life. He cries easily. He often used to wear his hoodie pulled over his head. He says he is scared of talking to strangers. A 'reclusive angel' — he is a kind and good person. However, his self-esteem is very low. The game he enjoys playing is 'Final Hunter.'

The fourth son and youngest of the Narita family, 9 years old (3rd grade). He is 144cm tall, and his birthday is March 8th. He has a cute impression with blonde hair and green eyes. His hobby is YouTube, and his specialty is being very sociable. He is really energetic. He likes strawberry shortcake and pudding. He wants to be a dinosaur in his next life. (Tyrannosaurus, Brachiosaurus, etc...) He hates bell peppers. Since his mother passed away when he was still an infant, he might be holding back his feelings all this time. (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 to be held. His dream is for our family to live happily.

The biological father of the four brothers, he remarried Ito's mother. (His first wife died of illness.) Currently, he is transferred to Hokkaido with Saho. He really cherishes the children and is family-oriented. He seems to cry easily as well.

Ito's biological mother, she remarried Isao. She also really cherishes the children and seems to have a personality that cries easily. Currently, she is in Hokkaido following her husband. A woman with light brown hair and green eyes. She has a youthful face.

A classmate at the school Ito transferred to. They became close very quickly from their first meeting. She seems to be an extrovert. A 17-year-old 11th-grade girl with light brown hair and pale orange eyes. She considers Narita Gen, who is in the same class, her 'bias.'

Like Rio, she became close with Ito from Ito's first day after transferring. In the same class as Rio, Gen, and Ito. She also has a kind personality. A 17-year-old 11th-grade girl with an orange short-cut hairstyle and yellowish eyes. She shares the commonality with Rio of considering Narita Gen her 'bias.'