Attack on Titan: Lost Girls

Attack on Titan: Lost Girls is a three-part original animation production spun off from the Attack on Titan saga, adapting the spinoff light novel of the same name. Instead of following the Survey Corps on the front lines, it narrows its focus to two young women from the main cast: Mikasa Ackerman and Annie Leonhart. Each installment offers a self-contained, more intimate look at life inside the walls, running alongside events of the parent series rather than retelling them.

One thread centers on Mikasa and her bond with Eren, unfolding within a vision of an alternate world in which her parents were never killed. The other follows Annie during her time with the Military Police Brigade in the Stohess District, where she agrees to take on a missing person case involving Carly Stratmann, a university graduate and the daughter of a wealthy businessman. With only a short window to work and the district's underworld full of dangerous figures, Annie leans on her comrade Hitch Dreyse for cover, and Hitch's help comes with conditions attached.

Across both stories the central conflict is as much internal as external: the pull between the lives these characters might have lived and the duties, secrets, and reputations that define them. Investigation and mystery drive the action, while the emotional weight settles on loyalty, identity, and what each woman is willing to sacrifice to keep her own position intact.

Attack on Titan: Lost Girls originated as a Japanese novel written by Hiroshi Seko, a spin-off of Hajime Isayama's Attack on Titan. The franchise record lists its source material as a light novel, and the book's stories turn on two female characters from the parent series, Mikasa Ackerman and Annie Leonhart, each receiving a self-contained narrative rather than a retelling of the main storyline.

A manga adaptation followed, beginning serialization in August 2015 and running through May 2016. That version carried the Lost Girls material into the comics format before the property was revisited for animation.

The animated adaptation was produced as a three-part original animation DVD rather than a broadcast television series. Its installments were released on December 8, 2017, April 9, 2018, and August 9, 2018, each bundled with the 24th, 25th, and 26th limited edition volumes of the original manga respectively. The three episodes run about 25 minutes each. The OVA is finished, has an English dub, and is available for streaming through Crunchyroll.

Attack on Titan: Lost Girls belongs to the wider Attack on Titan franchise, yet it stands apart from the main narrative line. It began as a light novel by Hiroshi Seko, a spin-off rather than a continuation or a retelling of Hajime Isayama's central story. The franchise's core follows Eren Yeager and the Survey Corps in their war against the Titans, while Lost Girls narrows its focus to two female characters, Mikasa Ackerman and Annie Leonhart.

Within the franchise's publication history, this manga adaptation arrived after the original series was well established, running from 2015 to 2016. It is not an alternate version of the main story and does not replace events in the primary canon. Instead it works as a side story that fills in character perspective, with one tale set in an imagined world where Mikasa's parents survive and another following Annie during her time in the Military Police Brigade.

A three-part OVA adaptation released in 2017 and 2018 alongside limited editions of the original manga carried that same side-story material into animation. Readers and viewers can treat Lost Girls as optional, self-contained companion material rather than a required chapter of the main storyline.