Always calm, collected, and rational. Initially an ambitious man who only cared about honing his skills, meeting his colleagues has awakened a hidden kindness and a sincere approach to the value of life. His weakness is a slight clumsiness when it comes to expressing his own emotions. A dual-specialist who handles advanced neurosurgery while serving in Emergency Medical Services.

Possesses a strong sense of responsibility and respects the rules. She appears gentle, but she is actually very strong-willed. Though she started out indecisive, she grows into a magnificent leader. Her weakness is being too serious, often pushing herself too hard. The staff leader of Emergency Medical Services. An expert in emergency medicine specializing in field command and overall team management.

Cheerful and a bit of a show-off. Initially an underachiever who spun his wheels, he is actually the hardest worker and is more sensitive and kind toward the pain of his colleagues than anyone else. His weakness is being too much of a jokester, sometimes over-reading the room. An orthopedic surgeon within the emergency team, specializing in fractures and trauma.

A flight nurse with higher professional standards than anyone, often strict with new doctors. She has faced many hardships in her private life but possesses the strength to never let it show. Her weakness is her perfectionism, which leads her to bottle things up alone. A flight nurse and specialist who boards the Doctor Heli to support medical procedures.

Sharp-tongued but possesses a passionate heart that stays closer to the patients than anyone. The polar opposite of Shiraishi and an intuitive type, she becomes Shiraishi's best friend as they acknowledge each other's strengths. Her weakness is her strong ego, which leads to clashes with superiors and patients. An emergency physician with extensive knowledge in obstetrics and gynecology, handling births at grueling emergency scenes.

A cool, cynical modern youth. Coming from a long line of famous doctors, he has the skills but remains somewhat detached, avoiding deep involvement with patients. A new fellow in Emergency Medical Services.

Serious but extremely timid and a bundle of complexes. He is painfully aware of his lack of skill and can fall into a panic during critical moments. A new fellow in Emergency Medical Services.

Bright, honest, and a bit of a ditzy mood-maker. She has a fangirl side, having aimed to become a doctor because of a TV drama, but she possesses a kindness that seeks to empathize with the patient's feelings more than anyone else. A new fellow in Emergency Medical Services.