Phenomenal Medical Skills: Boasts genius-level surgical techniques, performing accurate diagnoses and treatments at superhuman speeds on-site. Tragic Past: His origin as a doctor stems from losing his parents in a terrorist attack in the U.S. during his childhood. He has experience providing medical care in conflict zones and remote areas abroad, giving him the courage to remain unfazed in extreme conditions. Unwavering Policy: He doggedly pursues the MER mission of "zero fatalities," striving to save every life before him, regardless of whether they are friend or foe.

Outstanding Emergency Skills: Possesses vast knowledge and experience in emergency medicine. As the right hand to Chief Doctor Kota Kitami, she devotedly supports the team at grueling, time-sensitive disaster sites. Strong Single Mother: A single mother raising a daughter in preschool. Driven by a passionate desire to save lives, she balances demanding emergency field work with ward duties.

Affiliation: Tokyo Kaihin Hospital (Cardiovascular Surgery) Initial Stance: Originally aimed to be a cardiac surgeon, preferring to treat patients thoroughly in a perfect environment. She initially felt hesitant and resistant toward performing surgeries at dangerous sites with insufficient equipment. Growth: After witnessing Chief Kitami and the reality of life-or-death situations, she awakens to the importance of emergency medicine and grows into a reliable doctor.

Role: Anesthesiologist (Controls the patient's condition during surgery as the surgeon's right hand). Charm: Known for his gentle personality and devotion to his family. Position: Acts as a "father figure" who provides comfort and reassurance within the high-tension team and disaster sites. Affiliation: Deputy Chief of TOKYO MER. He later becomes involved with HAKATA MER and others, supporting emergency medicine across various regions.

Role: A hardworking nurse who came to Japan under an Economic Partnership Agreement (EPA). Personality: Serious and studious. She enjoys Japanese manga and anime. Note: The actress, Phonchi, is actually a Vietnamese national born in Japan (fluent in Japanese); her broken Japanese in the show is purely acting.

Role: Clinical Engineering Technologist / Emergency Medical Technician. Specialties: Maintenance of vehicles and machinery, drone piloting, and all things mechanical. Responsibility: Supports the team by driving the ER car and ensuring the safety management of medical equipment.

Character Traits and Charm "The Most Passionate Man": While he maintains a facade as a cold bureaucrat, Ryohei Suzuki describes him as "more passionate than Kitami and the type to get emotional quickly," baring his fervor at the scene of saving lives. Ideal Medical Policy: Having lost his mother due to medical disparity (unable to receive proper treatment due to lack of money), he aims for the top of the bureaucracy with a strong conviction to establish a medical system that everyone can access equally. He is a genius doctor who also serves as a bureaucrat (Medical Technical Official) for the Ministry of Health, Labour and Welfare.