Bish Prior to joining
Bish, Aina the End moved to
Tokyo and first worked as a singer at a nightclub in
Shibuya, then in a
backup dancing unit named Parallel for the singer Yucat. Following the disbandment of
Bis, the manager of the group, Junnosuke Watanabe, began auditions for a new group named Bish in January 2015. In March of the same year, Aina the End was revealed as one of the five members who passed the auditions. Within the group, she is known for her husky voice, and has also choreographed songs for Bish and
Empire. In December 2016, Bish briefly went on hiatus as she underwent surgery for
vocal polyps. She returned the next year for the release of the single "Promise the Star". After the release of
Wack & Scrambles Works, a joint album of groups under the management of
WACK that included the reformed Bis and
Gang Parade, a popularity contest was held for all participating members. The top two ranked members would release a single together under
Avex Trax. Aina the End won second place behind fellow Bish member
Cent Chihiro Chittiii. The single titled "Yoru Ōji to Tsuki no Hime / Kienaide" was released on September 19, 2018, with Aina the End singing the second song.
Solo work Outside of Bish, Aina the End has appeared as the vocalist for other artists such as
TeddyLoid,
Mondo Grosso,
Marty Friedman,
My First Story,
Dish//, and
Sugizo. In 2018, she formed the duo SexFriend with UK from Moroha to cover
Hide's song "
Bacteria" for the
Tribute Impulse album. She also performed the outro of the 2020 television drama
Shinitai Yoru ni Kagitte. The song, which is titled after the series, was the first song written entirely by Aina the End. She released her debut solo album,
The End, on February 3, 2021. Her first EP, ''
, was released on March 2. She released her second solo album, The Zombie'', on November 24. In 2022, she performed the dubbing voice for Porsha Crystal in
Sing 2. She was also the lead actress in the Broadway musical
A Night with Janis Joplin. In 2023, her singles "Red:birthmark" and "Ai Kotoba" were used in anime series' ''
Mobile Suit Gundam: The Witch from Mercury's second season and The Apothecary Diaries, respectively, as the ending songs. She also played the leading role in Kyrie''. In March 2024, Aina the End created the theme song "Frail" for the film
Hen na Ie. In July 2025, her single "
Kakumei Dōchū" was used as the opening song in the second season of the anime series
Dandadan. The song, written and composed by Aina, surpassed 6.5 million streams globally, made Spotify’s Viral Top 50 Global chart, and ranked in the Top 50 of
Billboard Japan's Hot 100 for three consecutive weeks. On
TikTok, the song surpassed 100 million plays. ==Discography==