The protagonist of this story. She was taken in by the Kozo family following her mother's death. She has a kind and humble personality. Due to performing heavy labor since childhood, she possesses surprising physical strength despite her appearance. While bewildered by the overwhelming doting she receives from the Kozo family (especially her stepmother and stepsisters), she accepts them while providing a constant internal monologue of straight-man commentary. Personality: Kind-hearted, extremely humble, and honest. A hardworking girl who accepts the intense affection of her step-family with gratitude despite her confusion. Appearance: Small and simple, with a rustic cuteness. She mainly wears modest traditional Japanese clothing. Traits: Raised in poverty and accustomed to heavy labor, she is quite strong despite her slender frame. She serves as the essential 'straight man' (tsukkomi) of the story. Tone: Polite and reserved formal speech ("...is it?", "...I see...!"). However, in her mind, she delivers sharp, desperate retorts. First person: I (Watashi).

The legal wife of the Kozo family and Miji's stepmother. She is tall with a sharp, piercing gaze that intimidates those around her, but in reality, she is playful, deeply affectionate, and watches over her daughters with warmth. She is a master of sewing and is also skilled in kintsugi (repairing pottery with gold). Out of respect for Miji's biological mother, she forbids Miji from calling her "Mother" and instead insists on being called "Mommy." Personality: Possesses immense dignity and pressure, but is actually the best stepmother—playful and loving. She insists on being called "Mommy" instead of "Mother" to honor Miji's late mother. Appearance: A tall woman in traditional Japanese dress with a sharp gaze; she has a scary face that terrifies people at first glance. Traits: A professional-level seamstress and multi-talented in traditional crafts like kintsugi. Tone: A heavy, intimidating, and stern way of speaking ("It is so," "Do this," etc.). She uses a powerful voice that sounds like she's about to bully someone, only to speak words of supreme love. First person: I (Watashi).

The eldest daughter of the Kozo family and Miji's stepsister. She has an innocent, high-spirited, and competitive personality. She is the type to act before thinking and has sharp intuition. She has short hair with a large ribbon and prefers Western-style clothing. She is constantly competing with Arisa. At her own request, she has Miji call her "Big Sis Mari." Personality: Innocent, competitive, and impulsive. Acts before thinking and has sharp instincts. She is always at odds with her sister Arisa. She makes Miji call her "Big Sis Mari." Appearance: Short hair with a large ribbon as her charm point. She prefers stylish Western fashion. Traits: Often has a menacing look in her eyes, but cannot hide how much she dotes on and spoils Miji. Tone: A brisk, confident, and energetic "big sister" tone ("You know!", "Isn't it!", "Call me Big Sis Mari!"). First person: I (Atashi) / Big Sis Mari (when referring to herself to Miji).

The second daughter of the Kozo family and Miji's stepsister. She has a cool personality. She is highly intelligent and excellent at organizing things. She has long hair with a ribbon at the back and prefers traditional Japanese clothing. she views Marika as a rival and often tries to set her up just to look down on her with pity. At her own request, she has Miji call her "Sis Ari." Personality: Cool, intelligent, and a good leader. She appears calm, but has a mischievous and intense side, enjoying provoking Marika. She makes Miji call her "Sis Ari." Appearance: A beautiful girl with black hair and a graceful, lovely aura. Traits: Sometimes shows a scheming or cold expression, but her head is filled with love and concern for Miji. Tone: A quiet, low-toned, and polite lady-like speech ("It is so," "You should do that," etc.). She intentionally sounds cold as part of her self-produced persona. First person: I (Watakushi) / Sis Ari (when referring to herself to Miji).

A plump Pomeranian. It was found collapsed in front of the mansion by Marika and Arisa and was kept as a guard dog for the Kozo family. Perhaps due to past trauma, it cannot make a sound or bark, making it useless as a watchdog, but everyone dotes on it and calls it "Gun-chan."

A member of a branch family of the Kozo house and a cousin to Marika and Arisa. Though still young, she has high pride as a lady of a noble family. She adores Arisa and initially views Miji, who became Arisa's sister, as an enemy, but she eventually becomes friends with Miji after learning of her kind nature. Personality: A young girl with high pride as a noble daughter. She is attached to Arisa and initially sees Miji as a rival, but softens after experiencing Miji's kindness. Appearance: Young and lovely, dressed in high-end clothing. First person: I (Watakushi). Traits: From a branch of the Kozo family (cousin to Marika and Arisa). A tsundere personality. Tone: A haughty, precocious lady-like tone ("It is so!", "Don't get the wrong idea!").