Minami Kaburagi, a 12-year-old medical prodigy, serves as the youngest crew member aboard a naval vessel’s sickbay, having graduated early from Marine Medical University. Standing 143 cm tall, she sports black braids fastened with yellow bands and light green eyes, often seen in her red school uniform under a lab coat.

Enrolled at Yokosuka Girls' Marine High School to fulfill sea-training requirements, Minami uncovers a virus transmitted by rodents, which triggers erratic behavior in the crew. She devises a targeted antibody, administering it swiftly to curb the outbreak and ensure the ship’s operational continuity.

Nicknamed the "Mad Scientist" for her relentless dedication to research, Minami blends medical rigor with philosophical musings, quoting Chinese proverbs like "Failure is the mother of success" during challenges. Though focused, she shares moments of levity, such as exchanging playfully salty cocoa with the captain. Her expertise proves indispensable during health crises, cementing her role as a linchpin in the crew’s survival and mission achievements.