Ryouhei Nakazato possesses a tall stature, dark complexion, short hair, and a beard, giving him the most mature appearance among his peers. He typically wears a school uniform or a jinbei. Academically held back a year, he shares a class with the younger Haruka Kasugano. Personality-wise, Ryouhei projects a carefree, spontaneous image, self-identifying as an ultimate ladies' man. He frequently uses cheesy pickup lines on women, particularly targeting Sora Kasugano. Despite his self-professed idiocy and occasional frivolity, he demonstrates reliability and perceptiveness, offering sound advice when needed. He excels at identifying core problems and acts as a confidant to Haruka, especially regarding Haruka's relationship with Nao Yorihime. His background establishes him as a childhood friend of Nao Yorihime and the best friend of Haruka Kasugano, also sharing a close friendship with Akira Amatsume. Prior to the story's events, he and Motoka Nogisaka mutually supported each other's unsuccessful romantic pursuits. Relationships define key aspects of his character. He harbors unrequited feelings for Sora Kasugano, persistently flirting with her and expressing desires to see her in swimwear, actions that consistently annoy her. He openly envies Haruka's daily proximity to Sora. Ryouhei maintains a supportive bond with Nao, providing Haruka insights into her emotional struggles following Haruka's past absence. His lighthearted dynamic with Akira results in their shared nickname "Double Akira," stemming from perceived personality similarities. Trivia notes include his name meanings: "Ryouhei" translates to "clear, flat, broad, level, even, peaceful," and "Nakazato" means "middle village." He remains the only major character across all media without romantic involvement in any route and the sole named male student besides Haruka.