Ryô Ueki attends the same high school as Ritsuka Uenoyama and Shogo Itaya, their classmate since junior high school's first year. He regularly joins them during breaks at the basketball court, a routine later including Mafuyu Satō. Standing around 180 cm (approximately 5'11"), his tall, athletic frame and lean, well-built physique reflect an active lifestyle. Sharp, angular facial features, a strong jawline, and calm, intense eyes convey a composed and serious expression. Messy blonde hair contrasts his cool demeanor. His school attire shows a laid-back personality with a slightly rebellious edge: typically a white T-shirt under an unbuttoned black school jacket, black trousers, and cream-colored shoes. In summer, he wears a short-sleeved white dress shirt, often untucked or with sleeves loosely rolled, paired with standard black uniform trousers. Ueki exhibits a calm, collected, and no-nonsense personality. Generally friendly but less talkative than his peers, he frequently moderates Shogo Itaya's exuberance, such as physically restraining him by the head when Shogo becomes overly energetic around others like Mafuyu. Shogo notes Ueki shares an interest in music, particularly live performances. Within school settings, Ueki appears during basketball practice, helping Ritsuka after a fall and questioning his distraction. In class, he observes Ritsuka sleeping and witnesses interactions involving Mafuyu and Ayano Kasai. He also participates in an art project where Shogo playfully disrupts him by sharing his drawing. Ueki attends Given's live performance at a concert venue, commenting on the large crowd and observing the audience's reaction as Mafuyu performs. His name, 植木 涼 (Ueki Ryō), combines the surname meaning "planted tree" with the given name meaning "cool" or "refreshing".