Momiji Itō (伊藤 紅葉), a member of the idol group TINGS under talent agency Brightest, also forms the duo YukiMoji alongside Yukine Gionji. Her surname Itō signifies "that one" and "wisteria," while her given name Momiji means "autumn leaves/autumn colors" or "maple."

Originally part of TINGS, Momiji departed with Yukine after discovering fellow member Haru Nabatame intentionally held back during performances, viewing this as a betrayal of trust. Brightest's president, Yūki Hinase, facilitated their exit as a strategic measure to pressure Haru into revealing her full potential. During their separation, Momiji and Yukine established the rival unit YukiMoji within the same agency.

Renowned for her exceptional dancing skills within the idol sphere, Momiji's proficiency is explicitly acknowledged by TINGS member Rio Seibu, who describes her ability as being at the level of a "shivering idiot." Despite the initial rivalry, Momiji and Yukine eventually rejoined TINGS following Kyōka Tamaki's urging to cease competition and reunite. Their return, however, did not resolve the core issue of Haru's continued reluctance to perform at maximum capacity.

The documented media does not detail Momiji's background prior to Brightest, her motivations for becoming an idol, or her personal history outside the group. Her character arc centers on her departure from and return to TINGS, her role in confronting Haru's self-limitation, and her contributions as a skilled dancer within the unit.