Yuho Mochizuki, a member of the idol group Sweet Diva, has short red hair, red eyes, and wears a distinctive large pink ribbon. She energizes the group as its mood maker and is frequently seen alongside fellow member Aika Hayase; together they form Sweet Diva's first subunit, Puffsleeves.

When Sakura Hagiwara temporarily leaves Sweet Diva to pursue professional wrestling, Yuho becomes noticeably distracted during performances, leading to onstage mistakes. Despite this disruption, she holds onto hope for Sakura's eventual return. Yuho supports Sakura by attending her wrestling matches along with other Sweet Diva members and their manager Makoto Kirishima.

During Sakura's second match against Rio Kazama, Yuho watches from the audience with Makoto and Elena Miyazawa. Her support continues when she appears as a guest commentator alongside Elena Miyazawa for the Newcomers All-Star Match. Though surprised by Sakura's decision to extend her wrestling career, Yuho remains committed to their friendship and actively follows Sakura's athletic progression.