Riku Seya, usually referred to by his surname, is a classmate of Maho's who meets her upon their entering junior high school. He is generally a soft-spoken boy who initially takes an interest in Shūichi, whom he believes to be a girl, when they first meet. Seya later becomes angry at Maho for stringing him along with Shūichi, though soon reconciles with her and even starts dating her.
