Koharu Shiromi is a student and member of the Millennium Science School's Emergency Medicine Club in the mobile game and anime series 'Blue Archive.' Known for her pink hair, energetic personality, and medical expertise, Koharu often acts as the team's combat medic, providing healing and support during missions. Despite her sometimes blunt or mischievous demeanor, she deeply cares for her friends’ well-being. Koharu plays an essential role in both combat and the storyline, helping to resolve crises within the school.