Yuriko Suemune, a founding member of the idol group Team May-Bee, competes in uniform number 13. Team May-Bee achieved success in the Kanagawa Tournament during prior competition seasons. At 138 cm (approximately 1.39 meters) tall and weighing 34 kg, she remains the shortest member of her team. Her stature frequently leads to mistaken assumptions that she is an elementary school student, though she is a 17-year-old third-year high school student. Her appearance features light brown hair styled in braids, blue eyes, and a signature outfit: a pink top layered over a white dress shirt, a black bow, a black skirt, long white stockings, and black shoes.

Within Team May-Bee, she reports to leader Hazuki Sakurai and sub-leader Tomo Miyashiro. Her fellow members include Chihiro Honda and Teena Merkies, with the team managed by a robot named Sanae and produced by Shinji Ibuki. Yuriko exhibits a sharp tongue and coolheaded demeanor that contrasts with her youthful looks.

Her given name Yuriko combines the characters for "help/assist" (祐), "village" (里), and "child" (子). The surname Suemune incorporates characters signifying "end/top end/future" (末) and "religion/sect/main point" (宗).