Gu Jae-hee is a fictional character from the South Korean television series To the Beautiful You. She is portrayed as a determined and athletic young woman who disguises herself as a boy to attend an all-male high school. Her main goal is to support her idol, Goo Jae-hee, a high jumper, and help him regain his confidence. Throughout the series, Gu Jae-hee faces various challenges while maintaining her disguise. She develops friendships with her classmates, including Hana, and navigates the complexities of teenage life, love, and identity. Her character embodies themes of perseverance and self-discovery.