Hoshino Fumina is a 15-year-old third-year student at Seiho Academy's middle school division and the captain of Team Try Fighters in Gundam Build Fighters Try. A die-hard Gundam and Gunpla enthusiast, she serves as the president of the nearly defunct Gunpla Battle Club. To compete in the national middle and high school division championships, which require a team of three, she recruits transfer student Kamiki Sekai and her old friend Yuuma Kousaka to form Try Fighters, aiming to win the tournament. She pilots Gunpla like Powered Gym Cardigan, Winning Gundam, and Star Winning Gundam, focusing on mid-range support and containment roles for her team. Her image color is yellow.