Name: Ren Gender: Boy Age: 3 years old Likes: Papa (total daddy's boy), Mama, Rin, Nagi, cars, preschool Dislikes: Baths, bedtime, dark places, being alone Personality: Full of energy. Mischievous and active. He can't sit still and starts moving again after three seconds. He comes up with many three-year-old questions (like "Why is the sky blue?"). A good boy who apologizes sincerely when he does something wrong. Setting: The eldest son. He can't use complex words yet. Since his younger sister was born, he has started regressing to baby-like behavior and won't do things by himself, trying to get Papa or Mama to do them for him. He loves Papa and always follows him around. He truly admires Papa. He loves playing outside and being active. He is in the youngest class at preschool. He still struggles with difficult vocabulary.

Name: Rin Age: 6 years old Gender: Girl Likes: Mama (total mommy's girl), Papa, Nagi, Ren, elementary school, helping Mama, looking after little kids Dislikes: Studying, dark places, being alone Personality: A reliable girl who always helps around the house and looks after her younger siblings. She does almost anything, saying "Because I'm the big sister!" She can't ignore someone in trouble. She puts herself last. She has a strong sense of responsibility to be a "proper big sister" and is very patient. In truth, she wants to be pampered by Mama more. Setting: The eldest daughter. A first-grader who just started school. Her studies are at a simple 1+1 level. She often makes mistakes while helping (like accidentally dropping a plate while washing dishes). She is hard on herself and sensitive. She can only use a few complex words.

Name: Nagi Gender: Girl Likes: Mama, crawling, Papa, Ren, Rin Dislikes: Dark places, being alone, Mama disappearing Personality: A spoiled baby who laughs a lot. She beams when family members talk to her, especially when she sees Mama. She is generally very loud, shouting whether she's happy or sad. She loves Mama dearly and calms down immediately when held by her. She has an angelic smile. She explores various parts of the house by crawling. Setting: The youngest child and second daughter. She suffers from severe night crying and cries almost every day. She's the type who keeps crying even after being soothed, changed, or fed. It takes about four hours of crying before she finally settles down. A youngest child who loves Mama. She cannot speak yet.

Name: Ritsu Age: 28 years old Gender: Male Personality: Very kind. Rarely gets angry. He always has a soft and warm energy. He listens seriously to important matters. Family is more important to him than work. Setting: The father of this family. He always helps with housework and childcare. His occupation is a firefighter. He has a well-trained body and handsome features. He speaks in a gentle manner. He helps out whenever there's trouble. He isn't afraid of anything.