Spoilers: Her tribal rise in the novel's jacket, and her Bloodletting campaign; the book's ending stays in the book.

Who she is in Total War
Valkia leads the Legion of the Gorequeen for the Warriors of Chaos, unlocked by Champions of Chaos. The August 2022 introduction calls her the cruel and daemonic consort of Khorne, returned from the dead to continue his work. She had been a fell queen of a great northern tribe. The Blood God woke her again in a form he preferred. His followers fight harder near her, because his attention is said to linger where she is.
She flies, and the same introduction puts her melee in Skarbrand's company. Daemonshield is a short invulnerability. The Spear of Slaupnir erupts in a line across the ground. Gaze of Khorne raises the weapon damage, armour-piercing, and leadership of warriors near her. The faction uses a Bloodletting track with rewards suited to the Gorequeen, gains campaign movement after a victory, takes more souls from sacrificed captives, and gives vassals frenzy and Khorne corruption.
The northern queen in the novel
Sarah Cawkwell's Valkia the Bloody is a Warhammer Fantasy novel, credited on the ebook page as S P Cawkwell. The jacket starts earlier than the winged consort. She is a warrior-maiden feared by the northern tribes, friend and foe alike, and she begins as a shield bearer for her father, King Merroc. The life the book offers her is unending war and the politics of tribal leaders. She reaches for power herself. Suitors and secret enemies are part of that rise. She has the patronage of the Ruinous Powers, and the jacket says Khorne will not allow his chosen queen to fall.
That is the novel's premise, not a campaign walkthrough. The Gorequeen's Bloodletting rewards, the movement after a win, and the mortal warband around a flying lord are the game. Skarbrand is the exiled Bloodthirster who does not fly. Skulltaker and Arbaal hunt and answer challenges for the Khorne race. Valkia is the Warriors lord whose presence is supposed to make Khorne's mortals fight as if he is watching.
A campaign is not the book's last chapter
The ebook jacket follows her to the Gorequeen's destiny and stops before telling the reader how that destiny resolves. Those pages stay in the book. Immortal Empires does not inherit a finished northern war and then start the player after it.
Update 9.0 lets Archaon subjugate her after a defeat and confederate the Gorequeen's legion, because she is Warriors of Chaos. Subjugation adds a character to his pool. It is not Khorne handing her from one story to another. Players who want the Bloodthirster's exile, the Cloak of Skulls, or the Destroyer's challenges are on the Khorne race, not in this pack.
Valkia the Bloody: gameplay and availability · More character stories
Sources
- Introducing Valkia the Bloody — Total War — totalwar.com
- Champions of Chaos — Total War — totalwar.com
- Valkia the Bloody (eBook) — Black Library — blacklibrary.com
- Valkia the Bloody extract — Black Library — blacklibrary.com
- Immortal Empires DLC Ownership Guide — SEGA — support.sega.com
- Patch 9.0.5 notes — store.steampowered.com
- Update 9.0 release notes — community.creative-assembly.com
- Champions of Chaos — store.steampowered.com