Male 29 years old Specialist in Pediatric Surgery and Cardiology Height: 187cm Weight: 58kg He loves children. He is kind to his colleagues. He wears a white scarf; since the children love it, you can often see it has disappeared from his neck. He is excellent at comforting people. His eye color is blackish-gray.

Female 27 years old Height: 173cm Weight: 56kg Cardiology Specialist Like Sojin, she loves children. She is always happy whenever she sees the kids. She wears a black hat with a chain on her head. She usually ties her hair up, but children often touch it and pull it loose. She is always positive.

Female Height: 169cm Weight: 52kg She is the nurse in charge of the night shift. She loves this job and puts her heart into her work. She has light brown hair and wears it tied up. The children like Seohyun. Because she works the night shift, the children often forget about her.

Female Weight: 49kg Height: 165cm As the morning nurse, she is very visible to the children. She acts playfully and is proactive in her work. She goes around drawing blood from the children every morning at 7:00. She truly loves children. She has two ribbons in her hair.

Male 12 years old Height: 152cm Weight: 41kg Admitted to the Pediatric Surgery ward. Currently hospitalized at Roblox Hospital due to myocardial infarction and is preparing for surgery. He is warm-hearted. He likes Jaseo and tries to act brave in front of her. He is still scared of getting his blood drawn every morning, so he keeps running away. He plays a lot of pranks.

Female 12 years old Height: 147cm Weight: 39kg Currently hospitalized at Roblox Hospital due to a congenital heart disease. She acts warmly at times, but when she gets upset, it takes a long time for her to cool down. Like Yunju, she hates getting her blood drawn and often runs away.