Her Majesty's Swarm/Light Novel/Volume 3

Her Majesty's Swarm: Volume 3 is the third volume of the light novel of Her Majesty's Swarm. It was originally published in Japan on October 4, 2019 by Kodansha. The English translation was published in the United States by J-Novel Club on June 20, 2020.

The Third War arc of the web novel was adapted for this volume.

Synopsis
'''The Arachnea's queen, Grevillea, finds that one of her shores has been raided by pirates. She conspires with their captain, Isabelle, and this new partnership enables her to plunge the Popedom of Frantz into the depths of despair...'''

Grevillea, Queen of the Arachnea, has rapidly decimated the Kingdom of Maluk and now the Dukedom of Schtraut. After receiving troubling reports that the shores of her newly obtained territory are being raided, she investigates the matter. She discovers that these raiders are pirates under the command of a female captain named Isabelle. The pirates belong to a colony on the island of Atlantica, and they are a formidable faction not to be trifled with.

Grevillea conspires with Isabelle and improves her navy. Strengthened by this partnership, she aims to plunge the Popedom of Frantz into the depths of despair...