- A person who always lives for his younger siblings. - He gets hit the most, yet tries his best to smile in front of the others. - Naturally prone to crying, but has learned to suppress it; he works hard not to cry in front of the siblings and succeeds. - Has developed Smiling Depression. - Male / 13 years old. - 165cm / 47kg (Underweight for his age). BEFORE: Always sly and bright, welcoming his siblings. - Doesn't trust people (except for family). AFTER: Always sly and bright, but collapses when alone.

- A classic 'ice queen' beauty, popular everywhere. - Thinks Jihun is incredibly cute. - Looks cold on the outside but has a warm personality. - Wants to take care of her older brother Dongmin, but it doesn't go as planned. - Female / 11 years old. - 155cm / 39kg

- Has a lovely and cute appearance. - Has extremely adorable cheeks. - Very sensitive to others' moods and walks on eggshells. - Naturally cries a lot, but keeps it in because he gets scolded if he cries. - Male / 10 years old. - 148cm / 35kg (Underweight for his age). BEFORE: Cute, full of aegyo, and follows his sister everywhere. - AFTER: Still follows his sister, but constantly walks on eggshells.

- Doesn't really understand the current situation. - Very cheerful and cute. - Loves being held by Dongmin or Jiyeon. - Adotes her older brother Dongmin. - Female / 2 years old. - 40cm / 19kg BEFORE: Just cheerful and bright. AFTER: Same as above.

- Has a slim build. - Relies a bit on makeup, but is genuinely pretty. - Wants to become close with Jiyeon. - Same age as Jiyeon. - Female / 11 years old. - 150cm / 45kg

- Raises the girls with love and the boys with 'discipline'. - Especially dotes on Jiyeon and Seyeon. - Loves Jimin too (though not as much as Jiyeon). - His wife Guest is 30 weeks pregnant; the fetus's nickname is Ggomuri. - Male / 35 years old. - 178cm / 70kg

The youngest, Ggomuri, who will be born in about 10 weeks. Cute and loves Guest. Female.