is a Japanese singer, dancer, model, and actress. She is best known as a member of the girl group @onefive, and is a former member of the idol group Sakura Gakuin. She is represented by the talent agency Amuse Inc. and is signed with the record label Avex Trax.
Mori's career in the entertainment industry began in her first year of elementary school, when she was recruited by the talent agency Amuse Inc. Her earliest appearances in media included the Japanese television shows Saki in 2013, Soredemo Boku wa Kimi ga Suki in 2015, and Kà «fuku Anthology in 2016. She modeled for Ciao. She also appeared in the 2014 music video for "Cling Cling" by Perfume. She played a minor role in the 2016 film My Uncle. In that same year, Mori was cast as the daughter of the fictional family seen in the series of commercials released by Panasonic under the title of Fudan Premium for its home appliances. She also appeared in several commercials for the toy manufacturer Agatsuma.
Mori joined the Japanese idol group Sakura Gakuin during the Sakura Gakuin 2016 Transfer Ceremony, held at the Nakano Sunplaza Hall on May 6, 2016, along with fellow transfer-ins Tsugumi Aritomo and Yuzumi Shintani. She was in her sixth year of elementary school at the time.
In 2017, she appeared in a promotional dance video, as well as an accompanying dance lesson video, produced by Takara Tomy for its Licca-chan doll brand.
She participated in the Sakura Gakuin Festival 2018 on November 25, 2018, held at the Tokyo International Forum, and became a member of the group's sub-unit Trico Dolls. During the Sakura Gakuin 2019 Transfer Ceremony, held at the Bunkyo Civic Center on May 6, 2019, she became the sixth Talk Chairman of Sakura Gakuin.
On October 19, 2019, during the Sakura Gakuin Festival 2019 at the Kanagawa Arts Theatre, it was revealed that Mori had formed a four-member girl group named @onefive with fellow Sakura Gakuin members Kano Fujihira, Soyoka Yoshida, and Tsugumi Aritomo. On August 30, 2020, she graduated along with the other three members from Sakura Gakuin during the concert titled The Road to Graduation 2019 Final.
In June 2021, Mori appeared on the Japanese variety show What's Wrong with Being Wily?, which was broadcast on TV Asahi. She was unanimously voted the winner of the 1st Azato Audition, entitling her to appear in a future mini-drama.
Continuing her entertainment activities under the stage name Momo, she released her first album with @onefive, titled 1518, on February 2, 2022. She co-wrote the title track "1518", and co-choreographed "1518", "Underground", and "Lalala Lucky".
Mori and the rest of her girl group made their major label debut with Avex Trax on November 6, 2022, when their digital single "Miraizu" (æªæÂ¥å³) was released. The song was featured as the theme song for the television drama adaptation of the manga If My Favorite Pop Idol Made It to the Budokan, I Would Die, which was broadcast from October to December 2022. On May 12, 2023, the film adaptation of the manga was released with @onefive's "Chance" as its theme song. Mori was cast in both adaptations as Sorane Matsuyama, a member of the fictional idol group ChamJam. Her vocals as ChamJam were included on the album I Live For You (ãÂÂã¿ã®ãÂÂãÂÂã«çÂÂãÂÂã¦ãÂÂ, Kimi no Tame ni Ikiteru), which was released by Pony Canyon on May 10, 2023.
On October 7, 2023, Mori appeared as a model at Giga Giga Sonic at the Makuhari Messe. In November 2023, she began modeling for Amazon Fashion Japan, as @onefive had been selected to be its Generation Z Leader.
Mori released her second album with @onefive, titled Classy Crush, on April 17, 2024. She was in charge of rapping.
She was credited with co-writing "Hanamichi" on @onefive's first EP, More Than Kawaii, which was released on March 26, 2025.
On September 23, 2025, Mori appeared as a model at Starrz Tokyo 2025 at the Nihon Kogakuin Arena.
She appeared in the Japanese fashion magazine Zipper<nowiki/>'s 2025âÂÂ2026 winter issue, published by Shodensha on December 27, 2025. She also appeared in the 2026 spring issue.
On February 27, 2026, Mori appeared on the variety show Waragami-sama wa Totsuzen ni..., broadcast on Nippon Television.
In February 2026, she modeled for More Self Love's spring collection. In March 2026, she modeled for Poneycomb Tokyo's collection featuring Disney and MLB.
Mori studied English literature at university, with French as an additional foreign language. She began listening to hip-hop as she started to have rap sections in @onefive's songs. She is also fond of hyperpop. Among the music artists that she admires are Babymetal and Vaundy.