[9] The single titled "Yoru Ōji to Tsuki no Hime / Kienaide" was released on September 19, 2018, with Aina the End singing the second song.

[10] Outside of Bish, Aina the End has appeared as the vocalist for other artists such as TeddyLoid,[11] Mondo Grosso,[12] Marty Friedman,[13] My First Story,[14] Dish//,[15] and Sugizo.

[16] In 2018, she formed the duo SexFriend with UK from Moroha to cover Hide's song "Bacteria" for the Tribute Impulse album.

[23] 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.

[26] In March 2024, Aina the End created the theme song "Frail" for the film Hen na Ie.