"Rio Futaba is one of the main characters in the Japanese manga ""Fantasy Sister!"". She is a young girl with a strong-willed personality and a love for fantasy.

Rio is a 16-year-old student who attends a prestigious high school in Tokyo. She has long, curly brown hair and big brown eyes that sparkle with excitement and curiosity. Rio is known for her energetic and adventurous personality, as she always seeks out new and exciting experiences.

As a fantasy lover, Rio spends most of her free time reading fantasy novels and playing fantasy video games. Her love for the genre is apparent in her fashion style, as she often wears clothing that resembles that of a fantasy character, with flowing skirts and intricate lace patterns.

Despite her strong-willed personality, Rio can also be quite naive and innocent at times, especially when it comes to matters of the heart. She has a crush on her classmate, Kaito, and often finds herself daydreaming about him.

Aside from her love interests, Rio also has a close relationship with her older sister, Yui. Yui is her role model and mentor, and Rio often turns to her for guidance and support. Rio is also close friends with the other main characters in the manga, including Miharu and Hikari.

Overall, Rio Futaba is a dynamic and adventurous character who adds an exciting element to ""Fantasy Sister!"". Her love for fantasy, energetic personality, and close relationships with those around her make her a beloved character in the manga."