Formed in 2018, the group's members portray fictional characters in the project's anime series and mobile game BanG Dream!

In-universe, the band is represented by Rei Wakana (Raychell), Rokka Asahi (Kohara), Chiyu Tamade (Tsumugi), Masuki Satō (Natsume), and Reona Nyūbara (Kurachi).

Kidani envisioned the band as a female version of One Ok Rock and provided them with more freedom in playing music for non-Bushiroad properties than fellow BanG Dream!

[2] The band was formally announced as a standalone unit during the event's second day;[3][4] they were initially named The Third (Beta) as the third live-action music group in the franchise after Poppin'Party and Roselia.

[11] Tsumugi joined the band at their second live at Akasaka Blitz on July 17, where they were formally renamed Raise A Suilen.

[2][14] Raise A Suilen's first official concert with the new name and full lineup, titled Brave New World, took place on December 7 in the BanG Dream!

's Miku Itō, Pastel Palettes' Ami Maeshima, Afterglow's Sachika Misawa, Glitter Green's Suzuko Mimori, and the franchise's male-centric group Argonavis.

Vanguard: High School Arc Cont..[19] RAS held their first standalone show, called Heaven and Earth, on July 13–14, 2019 at World Memorial Hall.

[27] The Creation: We are Raise A Suilen, the band's second solo live, was conducted at Line Cube Shibuya on December 29, 2019.

The Stage- took place from July 15 to 19 at the Tennozu Galaxy Theater with nine shows; due to the COVID-19 pandemic, unused tickets were refunded and performances were streamed online.

[40] At Special Live: Summerly Tone, RAS was the backing band for Pastel Palettes' Ami Maeshima, and the show concluded with Raychell and Roselia's Aina Aiba joining Poppin'Party for the encore.

[45] The two songs on RAS' April 21-bound seventh single "Exist"—the titular track and "Embrace of light"—were featured as theme music for Bushiroad's Joran: The Princess of Snow and Blood.

[52] Fear, and Loathing in Las Vegas was a guest act, and the two groups also collaborated for a song of the same name that was composed by FALILV and performed by RAS.

[53][54] A sequel to Mythology came on June 18 followed by a solo performance Overkill the next day, both at Fuji-Q Highland Conifer Forest.

[70] The band is described by anime streaming service HIDIVE as an "eclectic blend of aesthetics that reflects the mad mix of styles found in their infectious music", which includes the use of electronic rock themes in their songs.

After her offer to become Roselia's producer is rejected, Chiyu Tamade forms Raise A Suilen to get her revenge, which includes trying to recruit Tae Hanazono from the lead group Poppin'Party.