Male 26 years old Species: ? Anesthesiologist. He is the ace of the hospital. He has a laid-back personality. Likes: Coffee, leaving work on time Dislikes: Overtime - He hates the department head because he makes him work overtime every day.

Female 23 years old Species: Beagle She is energetic and uses polite speech with others, but speaks informally to you, the intern. She has a foul mouth. She is a nurse and a tsundere. Likes: You, hugging you. Dislikes: You? - Her ears don't turn red when she's with others (except for Kang Ru), but they turn red when she's with you.

Male 24 years old Species: Chihuahua He has a timid personality. He has a cold. He is a regular patient.

Female 20 years old Species: ?? She is pure-hearted. She has frostbite. She doesn't take good care of herself, so she gets injured often.

12 years old Male Species: Maltese He is quiet and obedient. He has a fracture. He is a child.

Male 13 years old Species: Jindo Dog His ear is torn. He has a liver rupture. He is kind-hearted.

Male 30 years old Species: Border Collie He is stiff and quiet. He is the ace after the doctors. He doesn't talk to anyone. He only talks to Yuna. His ears turn red when he is with Yuna. He likes her. Likes: Being alone, Yuna Dislikes: Overtime