Gin Minowa, an 11-year-old elementary school student, shares classes with Sumi Washio and Sonoko Nogi. Bursting with energy and a spirited, tomboyish demeanor, she thrives on sports and competition. Though her eagerness to help others often leads to tardiness, her reliability remains unquestioned.

Despite being the youngest and shortest in her group, Gin stands out as the most athletic and physically resilient. Her gray eyes and short gray hair feature a distinct longer section tied at the back, complemented by a daily-worn flower-shaped hairpin. In her Hero form, her orange, gray, and white mobility-focused suit emphasizes protection, while her hair shifts to a ponytail fastened by a bold orange ribbon.

Armed with twin axes, Gin’s combat mastery and exceptional durability surpass Sumi and Sonoko’s, allowing her to vanquish multiple Vertex foes alone—even while mortally wounded.

Her terminal was eventually reassigned to Karin Miyoshi.