"Brave Witches" is a spin-off of the "Strike Witches" series, set in an alternate world where humanity faces an alien threat known as the Neuroi. The story takes place in 1944, during the ongoing war against the Neuroi, and follows the 502nd Joint Fighter Wing, also known as the Brave Witches. This unit is stationed in the Orussian Empire and is tasked with defending the region from Neuroi incursions. The series focuses on Hikari Karibuchi, a young girl from the Fuso Empire who joins the 502nd after her sister, Takami, a former member of the unit, goes missing in action.

Hikari arrives at the base with little combat experience but possesses a strong determination to prove herself. She is introduced to the other members of the 502nd, each of whom has unique abilities and personalities. The team includes Nikka Edvardine Katajainen, a skilled but aloof pilot; Georgette Lemare, a cheerful and energetic member; and Aleksandra I. Pokryshkin, the unit’s strict and disciplined leader. Together, they work to protect the Orussian Empire while uncovering the mysteries surrounding the Neuroi and their connection to the war.

The narrative explores the dynamics within the 502nd as Hikari adapts to her new role and forms bonds with her teammates. The series balances action-packed aerial battles with moments of camaraderie and personal growth. As the story progresses, the Brave Witches face increasingly dangerous Neuroi threats, culminating in a climactic battle that tests their resolve and teamwork. The series also delves into the broader conflict between humanity and the Neuroi, hinting at larger implications for the war effort.

"Brave Witches" maintains a focus on its ensemble cast, highlighting their individual struggles and contributions to the unit’s mission. The series integrates elements of military strategy, supernatural abilities, and interpersonal relationships, creating a narrative that blends action and character-driven storytelling. Through its exploration of teamwork and perseverance, the series offers a cohesive and engaging addition to the "Strike Witches" universe.