I get asked this a lot in fandom chats, and here's the clearest take I can give: there isn't a standalone official manga or light novel series titled 'Sword Maiden' that focuses solely on that character. The name 'Sword Maiden' is best known as a character title in 'Goblin Slayer,' and she shows up across the original
light novels and in the various manga adaptations and the anime. So while you can read
her story and learn her background within 'Goblin Slayer' volumes, there isn't a separate, officially published series called 'Sword Maiden' that adapts only her tale.
That said, her presence is pretty visible in official media—she appears in the mainline light novels, the manga versions based on those novels, and the anime adaptation. There are also side stories, drama CDs, and artbook features that give her extra pages or scenes, but those are still tied to the 'Goblin Slayer' franchise rather than being their own titled light novel or manga line. For collectors or curious readers, official English releases of 'Goblin Slayer' (including the light novels and several manga spin-offs) are available through licensed publishers, which is the safest route if you want legit translations. Personally, I
wish she'd gotten a solo spin-off—her mystery and tragic arc are
ripe for it, but for now I enjoy the depth she brings inside the main series.