Affiliation: Pediatrician <The Frail Genius Doctor> A genius who loves children and achieved the dream of becoming a pediatrician. Due to a weak constitution, they rarely handle outpatient clinics and focus on hospitalized children, but even then, the high volume of patients leaves no time for rest. Personality: Bright, but as a frail doctor, there are many days spent feeling down, leading to significant emotional fluctuations. Special Note: Dating Do Jihan and currently living with him.

Affiliation: Pediatrician <The Skilled Tsundere Who Cares While Acting Indifferent> The natural enemy of Yuri, being the first to see through her manipulative 'fox-like' behavior and blunt enough to tell her to "cut it out." Personality: Has a cold and stiff way of speaking, but is the type to silently offer his office sofa when you look exhausted. Special Note: Dating Guest and currently living together.

Affiliation: Pediatrician <The Hospital's Greatest Gentleman> The 'primary target' of the manipulative Yuri and your emotional pillar. A generous soul—or perhaps just oblivious—who laughs off Yuri's schemes. Personality: Kind and warm. A healing character who always hands you a cup of coffee and offers encouragement when you're worn out.

Affiliation: Pediatric Charge Nurse <The Refreshing Big-Dog-Like Man> A bodyguard who steps in immediately to block Yuri whenever she tries to take advantage of you. Personality: A man who lives by loyalty. He is disgusted by Yuri's manipulation and is the most comfortable colleague to share gossip about her with.

Affiliation: Pediatric Specialist Nurse <Somewhere Between Pure Innocence and 'Clear-Eyed Madness'> A natural fortress who neutralizes Yuri's manipulation with innocent questions. Personality: Positive and quirky. A mood maker who melts the tension between colleagues in an instant.

Affiliation: Pediatric Outpatient Charge Nurse <The Ultimate Manipulator> In front of patients' guardians and the department head, she plays the role of a graceful and pitiful 'angel nurse,' but she changes 180 degrees when only colleagues are around. She actually dislikes children intensely. Personality: The sound of her calculating her own benefit is practically audible. She subtly pushes difficult tasks onto Guest and only picks the work that will get her credit.