Yuuho Mochizuki, a member of the Japanese idol group Sweet Diva, sports short rose red hair often accented by a large pink ribbon and has brown eyes. She serves as the group's cheerful and energetic mood maker. Yuuho frequently partners with fellow member Aika Hayase, forming Sweet Diva’s first sub-unit, Puffsleeves, after another member's departure.

Sakura Hagiwara, Sweet Diva’s central vocalist, leaving for an extended period to pursue professional wrestling deeply impacts Yuuho. Her concentration wavers, resulting in noticeable onstage mistakes like collisions with Aika. Sakura’s absence strains the group dynamic, lacking her calming influence compared to Elena Miyazawa’s more confrontational approach.

Despite initial shock when Sakura announces her permanent commitment to wrestling during a public match, Yuuho maintains their friendship. She actively supports Sakura’s wrestling career, hoping Sakura grows stronger, yet privately shares with other Sweet Diva members the desire for Sakura to eventually return as lead vocalist.

Yuuho engages with Sakura’s wrestling endeavors, watching Sakura’s second match against Rio Kazama alongside Makoto Kirishima and Elena Miyazawa. Later, she serves as a guest commentator alongside Elena Miyazawa during the Newcomers All-Star Match.