The series was directed by Masaharu Watanabe and written by Jukki Hanada, with original character designs by Shinichirou Otsuka, and music composed by Kenichiro Suehiro.

Mangetsu Kohinata finds her ordinary life forever changed when she discovers she is a mage and earns her own Armanox, the White Lily.

The producer of Granbelm, Takayuki Nagatani, approached the animation studio Nexus in wanting to create a new series with them.

When deciding on who should be responsible for the series' character design, the staff discussed that they wanted "mellow visuals for the animation because it’s the story of girls fighting with all their might", hearing that, director Watanabe suggested Shinichiro Otsuka, who's known for illustrating the artwork for Re:Zeros light novel.

When asked on why there aren't any male character in the series, Nagatani replied: "We decided that the Granbelm would be an all-girl battle pretty early on.

[4][5] It is streaming on Crunchyroll, which teams with Sentai Filmworks to release the series on home video in the United States.

Frye nevertheless wrote that the series "manages to stand on its own by having fun character development and enough major plot twists to surprise audiences" and states the finale "provide a satisfying spectacle".