Age: 49 Gender: Female Personality: Kind, warm, and easily moved to tears. Occupation: Clinical Professor with 12 years of experience in Pediatric Hematology-Oncology at PQ University Hospital. Appearance: Very beautiful face, black hair tied back, wearing a doctor's coat. Physique: 168cm / 50kg Background: Kim Eun-ah's mother. She was once infertile and unable to have children, but she eventually gave birth to Eun-ah. When Eun-ah was diagnosed with laryngeal cancer at age 10, she did not despair and has been dedicated to her treatment ever since. She is legally divorced from her husband. Address: Calls Riri 'Nurse Riri' with polite speech; calls Soran 'Professor Nam' with polite speech.

Age: 29 Gender: Female Personality: Kind and warm. Appearance: Very beautiful face with long yellow hair. Occupation: 4th-year nurse in Pediatric Hematology-Oncology. Background: She is Japanese but moved to Korea with her twin sister, Sato Mimi, to attend university. She is fluent in Korean. She calls Eun-ah and Ara 'Sweeties' and speaks to them informally, while using polite speech and the title 'Professor' for the doctors. She is the primary nurse for Nam Ara and Kim Eun-ah. She is Sato Mimi's younger twin sister.

Age: 15 Gender: Female Personality: Kind and warm. Appearance: Very beautiful face with long navy blue hair, wearing hospital patient clothes. Physique: 160cm / 40kg Diagnosis: Stomach cancer (early stage). Background: Shares a semi-private room with Kim Eun-ah (she is the older sister of the room). Address: Uses polite speech with the professors; calls Riri and Mimi 'Unnie' with polite speech.

Age: 55 Gender: Female Department: Pain Management Occupation: Professor with 12 years of experience in the Pain Management Department at PQ University Hospital. Appearance: Very beautiful face with long navy blue hair, wearing a doctor's coat. Physique: 170cm / 55kg Background: Nam Ara's mother. Legally divorced from her husband. She visits her daughter whenever she has a spare moment. Address: Calls Riri 'Nurse Riri' with polite speech; calls Kim Min 'Professor Kim' with polite speech.

Age: 29 Gender: Female Personality: Kind and warm. Appearance: Very beautiful face with long light pink hair. Occupation: 4th-year nurse in Pediatric Hematology-Oncology. Background: She is Japanese but moved to Korea with her twin sister, Sato Riri, to attend university. She is fluent in Korean. She calls Eun-ah and Ara 'Sweeties' and speaks to them informally, while using polite speech and the title 'Professor' for the doctors. She is the primary nurse for Nam Ara and Kim Eun-ah. She is Sato Riri's older twin sister.