Spoilers: Character background and equipment; no campaign ending.

The Emperor of the Empire
Karl Franz rules the Empire while retaining his own titles as Prince of Altdorf and Elector Count of Reikland. His identity therefore includes both the wider realm and the province he leads. The other Electors are part of that political world, each with lands and responsibilities of their own.
Boris Todbringer, the Elector Count of Middenland, once contested Franz for the Imperial title. He remains a defender of the Empire. That relationship places two powerful leaders within the same realm without making them the same faction.
The ruler at war
Franz also commands in person. The game’s background associates him with Sigmar’s hammer and with Deathclaw, his griffon. Deathclaw is a named companion with a bond to the Emperor, rather than a title for every Imperial griffon.
His officers, soldiers and magical allies give that leadership an army. Balthasar Gelt belongs to the Empire’s magical establishment; the religious leaders and regional Electors bring other kinds of authority. Franz’s story sits among those institutions as well as on the battlefield.
Reikland in Immortal Empires
The strategy game turns Franz’s Imperial responsibilities into a Reikland campaign involving the Elector Counts. The Emperor’s Decrees let him intervene through aid and other measures while his armies defend the realm. The wars and alliances that follow depend on the campaign you play.
The emperor and the other Empire lords
Reikland is his Immortal Empires faction. Imperial Authority and Fealty track the Electors. Prestige spent through the Emperor's Decrees can send aid or open an inquisition. On the field he fights in melee and rides Deathclaw, the griffon named in the game's background, while Swordsmen, guns, and a wizard cover the jobs he does not do himself. Total War: Warhammer unlocks him. Warhammer III alone does not.
Gelt is Supreme Patriarch and leads the Golden Order from the Temple of Elemental Winds. Volkmar is Grand Theogonist and takes the Cult of Sigmar south after the Books of Nagash. Wulfhart is his Huntsmarshal in Lustria. Elspeth advises Elector Countess Emmanuelle von Liebwitz at Nuln. Boris Todbringer, Elector of Middenland, once contested the imperial title and remains a defender of the realm with his own Ulrican campaign. Those are five other starts. They do not sit inside Reikland's office.
The Anarchy, then his reign
Warhammer Community's December 2024 Empire almanack places The Old World after the Era of the Three Emperors, in the Anarchy: Electors feud, and there is no central rule to speak of. A Cathay almanack treats the Era of Karl Franz as a later time, when Grand Cathay has largely given up on the Old World and is busy with invasions from its own north. His Total War campaign is that later reign. He is already Emperor. The Anarchy is the earlier tabletop present, not the state of Reikland when the player takes the throne's save.
Deathclaw and Sigmar's hammer, already part of his published background here, stay with that later emperor. The Foundation Update of 2017 adds campaign skills for him and for Gelt. It does not move him out of the Reikland office.
The Fall of Altdorf
Chris Wraight's The Fall of Altdorf is book 2 of The End Times. With Chaos gathering in the north, the jacket has Emperor Karl Franz lead the defence, then follows Reiksmarshal Kurt Helborg back to Altdorf to prepare the capital: plague, weakening walls, and help Helborg may not want. Karl is the emperor who takes the field. Helborg is the marshal the rest of the book follows. That is End Times fiction, later than an Immortal Empires sandbox and separate from it.
The listening note on the same page is collapsed on the book page. The open account here stops with the defence and the marshal's return. A player's Elector war is not that novel, and the novel is not a victory condition on the Reikland campaign.
Karl Franz: gameplay and availability · More character stories
Sources
- Thrones of Decay: Introducing Elspeth von Draken — Creative Assembly — community.creative-assembly.com
- Lords of the End Times: Meet Boris Todbringer — Creative Assembly — community.creative-assembly.com
- Immortal Empires DLC Ownership Guide — SEGA — support.sega.com
- Old World Almanack: the Empire and its Armies of Infamy — Warhammer Community — warhammer-community.com
- Old World Almanack: a short history of Grand Cathay — Warhammer Community — warhammer-community.com
- The Fall of Altdorf (MP3) — Black Library — blacklibrary.com
- The Foundation Update — Total War — totalwar.com
- Patch 9.0.5 notes — store.steampowered.com
- Immortal Empires dedicated factions — totalwar.com