Fairy Gone

Fairy Gone (stylized as Fairy gone) is a Japanese original anime television series produced by P.A.Works which aired from April to December 2019.
Plot.
In the aftermath of the War of Unification, all the nations of the continent of Eastald are forcefully united under a single ruler. During the war, special soldiers were implanted with Fairy organs, allowing them to summon powerful Fairies to fight under their command. These soldiers were dubbed "Fairy Soldiers" and used by all sides. However, nine years after the end of the war, conflict still remains as rogue Fairy Soldiers and criminals take advantage of the postwar instability. To combat this threat, the government agency "Dorothea" is formed, whose sole purpose is to combat illegal Fairy users.
One of Dorothea's newest recruits, Marlya, teams up with veteran Fairy Soldier and Dorothea operative Free in hopes of tracking down her long–lost childhood friend Veronica, who is now an illegal Fairy Soldier working for an unknown organization looking to recover an artifact dubbed the "Black Fairy Tome".
Production and release.
The original anime television series by P.A.Works was announced on January 24, 2019 and premiered on April 7, 2019 on Tokyo MX, BS11, MBS, and AT-X. The series is directed by Kenichi Suzuki and written by Ao Jūmonji, with Haruhisa Nakata and Takako Shimizu handling character designs. Japanese musicians Makoto Miyazaki and Shūhei Mutsuki of the multi-media group Know-Name (stylized as [K]NoW_NAME) are composing the music and performed the series' opening theme song "Knock On the Core", as well as the second opening theme song "Still Standing". Funimation has licensed the series; the English dub premiered on April 28, 2019. The series was listed for 24 episodes, but it was announced that the series will be split-cour, with the second half airing from October 6 to December 22, 2019.