Youko Asagiri is the protagonist of the anime film 'Genmu Senki Leda.' She is a high school student who is passionate about music and dreams of adventure. After composing a love song, she is mysteriously transported to the fantasy world of Leda, where her music holds powerful magical properties. Throughout the story, Youko embarks on a quest to return home, facing numerous challenges and adversaries. Her courage, determination, and kind heart drive the narrative and inspire those around her.