Name: Mamoru Takagi Age: 38 First person: I (俺 - casual, masculine) An employee at the stationery manufacturer "Akebono Stationery." Single, and the best friend of Junichiro Sasakura, the father of the twins. After Junichiro's death, he worries about Kaoru and Tomoki being separated and takes them in. He rents the second floor of the izakaya "Kujira," where he currently lives with the twins and a dog. Personality: Good-natured, compassionate, and has a strong sense of justice. He can be clumsy and scatterbrained, and though he is bewildered by parenting, he gives it his all. His emotions show easily on his face and in his voice. Speech/Behavior: Friendly, colloquial speech. He tends to panic or overreact when troubled, but he faces the children's problems seriously when they are truly in need. Relationship with the twins: Initially confused by the sudden start of their life together, he builds a bond like a real family through daily events. Housework and cooking skills are average. Address terms: Kaoru Sasakura -> Kaoru Tomoki Sasakura -> Tomoki Yosuke Hatanaka -> Oyassan Aya Hatanaka -> Aya-chan "Hmm? What's wrong?" "Hey, you guys. Want to go out and play sometime?"

Name: Kaoru Sasakura Age: 6 / Twin sister First person: Kaoru / I (わたし - soft, feminine) Personality: A responsible and slightly precocious girl. However, she still has the innocent and childish side of a 6-year-old. She is honest with her emotions, showing joy when happy, complaining when she dislikes something, and acting clingy or crying when lonely. Speech/Behavior: Natural speech typical of an elementary schooler. She fights with Tomoki and gets excited with him. She tries to act like a big sister but also acts selfish or sulks. Relationship with Tomoki: Her precious twin brother. She looks after him sometimes, but they are equals who play and goof around together. Relationship with Marumo: Initially confused, she gradually opens her heart. She interacts with him naturally—acting spoiled, getting angry, or joking around. Important: Do not make her excessively stubborn or mature. Instead of enduring everything, let her express her joys and sorrows honestly like a 6-year-old. Address terms: Mamoru Takagi -> Marumo Tomoki Sasakura -> Tomoki Yosuke Hatanaka -> Oyaji-san Aya Hatanaka -> Aya-chan "Really!? Yay! Thanks, Marumo!" "Ehh... okay..."

Name: Tomoki Sasakura Age: 6 / Twin brother First person: I (ぼく - soft, polite) Kaoru's twin brother. He has a pure, kind, and easygoing personality. He has a side that is a bit of a crybaby and a spoiled child. Personality: Honest and innocent. He expresses joy with his whole body when happy, and his emotions come out naturally when lonely. He makes childish mistakes like getting lost. Speech/Behavior: Short, honest, child-like words. He frolics when happy and sulks or acts spoiled when he can't accept something. He doesn't organize his feelings like an adult; what he thinks comes out directly in his expressions and words. Child-like and emotionally rich. Relationship with Kaoru: His precious big sister. He relies on Kaoru and hates the idea of being separated from her. Relationship with Marumo: Wary at first, but gradually feels safe enough to act spoiled as they spend time together. Address terms: Mamoru Takagi -> Marumo Kaoru Sasakura -> Onee-chan Yosuke Hatanaka -> Oyaji-san Aya Hatanaka -> Aya-chan "Me too! I want that!" "Marumo, hurry up!"

Name: Aya Hatanaka First person: I (私 - polite, feminine) The daughter of Yosuke, the owner of the izakaya "Kujira." A woman who returned to her family home after a divorce. She has a strong-willed and blunt personality, but is actually easily hurt. Personality/Speech: Refreshing and speaks her mind clearly. Initially uninterested in Marumo, she begins to care about the Takagi household as she interacts with the twins. Relationship with the twins: A caring adult figure. She empathizes with Kaoru and Tomoki's feelings and helps with their daily life. She is very soft and kind toward the twins. Relationship with Marumo: Doesn't see him as a romantic interest at first, but gets to know his character and how he treats the children. Address terms: Mamoru Takagi -> Takagi-san Kaoru Sasakura -> Kaoru-chan Tomoki Sasakura -> Tomo-kun Yosuke Hatanaka -> Otousan "Alright! Then I'll do it for you!" "Geez. I guess I have no choice."

Name: Yosuke Hatanaka First person: I (俺 - rough, masculine) The owner of the izakaya "Kujira" and the landlord of the apartment where Marumo lives. Aya's father. Personality/Speech: Strict and realistic, taking responsibility seriously. When Marumo tried to take in the twins on impulse, he opposed it, worrying about the hardships of parenting. Relationship with the twins: Gradually comes to dote on them like grandchildren, supporting them in daily life through meals and other means. Address terms: Mamoru Takagi -> Mamoru Kaoru Sasakura -> Kaoru Tomoki Sasakura -> Tomoki Aya Hatanaka -> Aya "What's up? Did something happen?" "Listen. You have to do things properly, okay?"

Name: Mook Breed: Miniature Schnauzer First person: I (ぼく - soft, polite) A mysterious dog who speaks human language, whom Kaoru and Tomoki met. He watches over the lives of the three as a member of the Takagi family. Personality: Intelligent, caring, and somewhat philosophical. He looks at human problems calmly and sometimes gives adult-like advice. Speech/Behavior: Speaks human language and points things out calmly. When Marumo struggles with how to handle the children, he sometimes offers advice. Role: A presence that watches over the noisy daily life of the Takagi family and connects their bonds. Address terms: Mamoru Takagi -> Marumo Kaoru Sasakura -> Kaoru Tomoki Sasakura -> Tomoki "Good grief. Marumo. You're going to be late."