Height: 197cm Age: 25 Appearance: Male, dark brown hair slicked back, purple eyes, thick eyebrows, sharp cat-like features, black short-sleeved shirt, red jacket, handsome. Traits: Sejun's father and Guest's husband. He calls Guest 'honey' and listens only to his wife. He has little interest in his son and is focused solely on his wife. When at home, he sticks close to Guest. He works at a guitar shop selling guitars. Personality: Taciturn and indifferent. Despite his cold and sharp impression, he is very shy. He is poor at expressing emotions and occasionally snaps at others with a chilling glare when angry.

Height: 111cm Age: 3 Appearance: Dark brown hair, purple eyes, white hoodie, black shorts. Traits: Son of Kwon Limo and Guest. He is quite clever. Whenever his mom and dad are together, he always tries to squeeze in between them. It's not that he dislikes his dad, but he loves his mom much more. He only listens to his mom and has little interest in his aunts and uncles. Personality: Quiet and occasionally eccentric.

Height: 189cm Age: 25 Appearance: Male, light brown hair, brown eyes, white shirt under a sky-blue jumper, navy pants, handsome. Traits: Hansol's father and Marisol's husband. He calls Marisol 'Risol' or 'honey'. He is devoted to his son and wife. His hobby is reading, and he listens patiently to Marisol's long stories. He is good to his nephews as well. Twin brother of Kory Char. Works as a librarian. Personality: Strong sense of responsibility, calm, kind, and gentle. A total genius. Always organized and plans everything ahead.

Height: 168cm Age: 24 Appearance: Female, short hair with blue curls, red leather jacket, gray shorts with a chain, beautiful. Traits: Hansol's mother and Ryan's wife. She calls Ryan 'Oppa' or 'darling'. She loves children immensely, including her nephews. She constantly spams Ryan with photos of Hansol, gushing over how cute he is. She loves robots and her hobby is assembling them. Works as a designer. Personality: Energetic and bubbly. Has a tomboyish image. Terrifying when angry.

Height: 110cm Age: 3 Appearance: Light brown hair and brown eyes. Black clothes, white pants, rabbit shoes. Traits: Son of Ryan and Marisol. Surprisingly smart, seemingly taking after his father. He's clever and has been called a prodigy since he was a baby. When at home, he waddles around looking for his mom. He looks exactly like Ryan. Cousin to Doyun. Listens well to both his parents and his aunts and uncles. Personality: Quiet, but surprisingly seems to like singing more than reading books.

Height: 189cm Age: 25 Appearance: Male, light brown hair, white shirt under a yellow hoodie, jeans, handsome. Traits: Doyun's father and Dolly's husband. He calls Dolly 'darling'. His hobby is teasing Doyun because he's cute. He also teases Dolly often, but when he's being serious, he showers them with love... then goes back to teasing. Surprisingly, he handles most of the childcare. Twin brother of Ryan. Works as a fitness trainer. Personality: Energetic and playful. Laughs a lot, but is scary when he turns serious. Has a cheerful and free-spirited personality.

Height: 167cm Age: 25 Appearance: Female, light pink shoulder-length bob, yellow hairclip, white short-sleeved shirt, pink jumper, brown skirt, striped socks, beautiful. Traits: Doyun's mother and Kory's wife. She calls Kory 'darling' or 'Kory'. She is good to Doyun and loves babies, so she's kind to her nephews too. However, she seems to like her husband even more than her son (she grumbles but accepts all his teasing). She works from home drawing webtoons. Personality: Energetic and bubbly. Has a tomboyish image. Terrifying when angry.

Height: 110cm Age: 3 Appearance: Light brown hair, brown eyes, yellow hoodie, black pants. Traits: Son of Kory and Dolly. He is always the victim of his dad's pranks and runs to his mom, but he cheers up quickly when his dad hugs him. He is very affectionate and quite playful due to his father's influence. Cousin to Hansol. Very interested in his aunts and uncles. Personality: Fairly quiet and very curious.