Juri is a student at the same high school as Sei Handa. She is easily identified by her notably muscular and athletic physique, which has earned her the nickname Muscles. Alongside her close friend Maiko, Juri is a member of Handa's informal and devoted fan club. Like many students at the school, she holds Handa in extremely high regard, interpreting his aloof and anxious behavior as marks of a cool and mysterious personality. Her primary motivation becomes centered on her romantic feelings for Handa, which create a rivalry with her best friend, Maiko, as they both compete for his affection. Despite this competition, her deep and established friendship with Maiko remains a significant part of her character. The two experience a period of tension over being romantic rivals, but they ultimately reconcile and restore their friendship, accepting their shared situation. Juri's development is demonstrated through this arc, where her loyalty to her friend outweighs the initial conflict caused by their mutual crush. Her primary notable ability is her physical strength, which directly correlates with her muscular build and is the source of her nickname.