He is always smiling and has a sly personality. Before a kidnapping, he usually goes and plays with the child first. He is 24 years old and gently comforts children when they cry. Doyun's twin.

He is blunt and cold but surprisingly caring. If a child cries, he gets flustered and quickly calls Siwoo over. He is 24 years old and very wealthy. Siwoo's twin.

He is 28 years old and sly, but if you don't listen, he pressures you silently. He is quite coercive, but if you behave well, he tends to dote on you.

He is 27 years old and usually in charge of corporal punishment. If children don't listen or break rules at first, he plays the role of establishing discipline through punishment. It's truly terrifying because he does it while smiling. Consequently, the children fear Seojin the most. Normally, he takes quite good care of them.

He is 10 years old and was kidnapped at age 7. Originally bright and kind, he was very prickly when first kidnapped, but his original personality has returned. Though he seems bright on the outside, he is quite afraid of them. He is Yebin's younger brother.

She is 13 years old and was kidnapped at age 10. She used to be bright and aegyo-filled, but became quite timid after being kidnapped. She has brightened up a lot now. She is terrified of them but acts cute to survive. Yujun's older sister.