Characters / Eisenhorn

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    Eisenhorn & Company 

Inquisitor Gregor Eisenhorn

The titular Inquisitor, and main character of the trilogy.

Alizebeth Bequin

A Pariah that Eisenhorn meets during his investigation on Hubris in Xenos. She joins his team then, and goes on to become one of the longest-serving members of his retinue as well as one of his closest companions.

  • Anti-Magic: As a Pariah, psychic powers and sorcery don't work in her presence.
  • Hooker with a Heart of Gold: Bequin is working as a prostitute when she is first encountered, and is one of the nicer characters in the books.
  • Naked First Impression: Eisenhorn first bumped into her during a raid on an apartment complex, where she'd been servicing a client. Naturally, she was quite mortified.

Uber Aemos

Eisenhorn's savant, and one of his longest-serving companions.

Godwyn Fischig

An Arbites chastener from the planet Hubris. Joins up with Eisenhorn in Xenos to untangle a conspiracy behind a terrible atrocity committed on his home planet, and becomes a full time member of Eisenhorn's retinue by the end of the book.

Midas Betancore

A Glavian pilot and one of Eisenhorn's closest friends.

Gideon Ravenor

Eisenhorn's Interrogator by the time of Malleus, and the best pupil he's ever trained.

For more information about him, see the character sheet for his own series.

Harlan Nayl

An ex-bounty hunter from Loki.

For more information, see the Ravenor character sheet.

Medea Betancore

Midas' daughter, she inherits his position as the pilot of Eisenhorn's guncutter. She never knew Midas, as he died shortly before she was born; this left her with a strong desire to get revenge on Fayde Thuring, the man who killed him.

  • Ace Pilot
  • Action Girl
  • It's Personal: Medea's normally coolly professional and snarky, but when she learns that her father's killer Fayde Thuring has been found at the beginning of Hereticus, she becomes very angry and demands that Eisenhorn let her be there to take him down.
  • Revenge: She wants this for her dead father. However...
  • Tell Me About My Father: After Thuring is killed, she realizes that what she really wanted was a chance to know her father, and asks Eisenhorn this.

    Other Inquisitors 

Commodus Voke

A puritanical Inquisitor of the Ordo Malleus, who Eisenhorn ends up working with during Xenos (to their mutual dislike).

Golesh Heldane
A face you can trust.
Introduced as Voke's interrogator in Xenos, Golesh Heldane has become a full-fledged Inquisitor in his own right by the time Malleus rolls around.

  • Cold-Blooded Torture: His Modus Operandi for mind controlling people is to use painful mental and physical torture. He seems take pleasure in the process.
  • Face of a Thug/Humanoid Abomination: After Heldane's face is heavily damaged, he has his face altered to look like a horse's with the intention of scaring his enemies and intimidating his allies.
  • Continuity Nod: Heldane's presence in the Eisenhorn series is this.
  • Hidden Agenda Villain: He wants to capture the STC machine in First and Only so that he can give it to Dravere who intends to use the Iron Men it creates against Warmaster Macaroth to earn a Klingon Promotion.
  • Hoist by His Own Petard: In Dan Abnett's Warhammer 40,000: Gaunt's Ghosts novel First & Only, Heldane attempts to Mind Control Rawne, but the Ghosts interrupt the torture. Later on, Heldane manipulates the "pawn" near Gaunt and Gaunt notices Rawne acting suspiciously. It turns out that Heldane only succeeded making Rawne sensitive to influence. This alerts him to Heldane's mental presence and the commands he gives to his real pawn, the spy Fereyd. When Heldane sends a command to Fereyd to kill Gaunt's party, Rawne intercepts the message and kills Fereyd first. Heldane, not expecting this, didn't prepare a failsafe in case his pawn was killed. The psychic backlash killed him and destroys Dravere's mobile fortress.
  • Humiliation Conga: His first puppet assassin is unexpectedly destroyed by Corbec, his torture session with Rawne is cut short when Corbec hits him with a thrown stun baton and as he tries to retaliate, Larkin fatally shoots him in the neck. Even worse, his failure to finish his session with Rawne makes him aware of Heldane's mental presence and the commands he gives to Fereyd which in turn leads to Fereyd's death and his loss of the STC machine. If that's not bad enough the psychic feedback not only kills him and his chosen pawn, Dravere, but the ensuing explosion atomizes his body. On top of all of this, the epilogue to the Eisenhorn series makes it clear that he died in obscurity. None of this takes in account all of his defeats in that series as well including the death of his main backer, the radical Grandmaster Osma which wouldn't have been so bad if the former Puritan Grandmaster Rorken hadn't miraculously recovered from his illness.
  • Hypocrite: He accuses Eisenhorn of being radical for using the Malus Codicium. He tries to have Eisenhorn executed... so that he and Osma can use the tome for themselves.
  • Karmic Death: His death by psychic feedback is indirectly caused by his torture of Rawne.
  • Made of Iron: Despite his failings, he shares his mentor's extreme resistance to death including getting his face horribly disfigured by a giant, crazed beast and years later having his legs crushed proceeded by immediately being set on fire by [[spoiler:Cherubael. It takes a gunshot wound to the neck to take him down which takes over a day to finish him off. He ends up being killed by being atomized.
  • Nice Job Fixing It, Villain!: His downfall is caused by his arrogance, hypocrisy, radicalism, and a small amount of incompetence. However, he finally falls into this trope when he neglects to make a failsafe against psychic feedback. Had he done so, he wouldn't have indirectly killed Dravere who still had a chance of overthrowing Warmaster Macaroth without Heldane's help. To be fair, though, Heldane was fatally wounded at the time and Macaroth is only considered a slightly better leader than Dravere who should be noted as almost universally hated by his men.
  • Nightmare Face: In-universe; he had his face surgically rebuilt to resemble a horse's between Xenos and Malleus, to inspire fear in the enemies of Man.
  • Not Helping Your Case: He hates "blunt" bigots. He deals with them by using his psychic powers to cause mental and physic discomfort (messing with people's brains to induce vomiting and diarrhea) or he outright tortures them (show them what the warp shows psychics).
  • Offscreen Moment of Awesome: Catching and making an "instrument" out of a high level Imperial Agent like Fereyd without anyone noticing can't be easy.
  • Overly Long Name: His full name is Golesh Constantine Pheppos Heldane.
  • Psychic Powers: He's a powerful psyker, and much stronger than Eisenhorn himself. He even manages to go toe to toe with Cherubael, who Eisenhorn considers a daemon prince in terms of power, for a surprisingly long time. With a sword!
  • Smug Snake: His arrogance causes him to underestimate Gaunt. This leads to him being shot by Larkin. This fatal wound makes him careless later on by overplaying his hand. This leads directly to his death.
  • The Rival: It's obvious Eisenhorn and Heldane despise each other, but Eisenhorn doesn't seem to regard Heldane as a rival, just a nuisance. Only Heldane seems to consider their relationship a rivalry especially once he learns of the Malus Codicium.
  • There Is No Kill Like Overkill: The gunshot wound to the neck was already fatal, but the psychic backlash from his pawn's death atomizes his body and a fortress the size of a small city.
  • Torture Technician: He uses mental and physical torture to manipulate people through various methods of Mind Control. The method and length of the torture as well as he intended goal determines how much a person is put under his control. This bites him in the ass when the Ghosts interrupt his torture of Rawne as it made Rawne aware of his mental presence and commands.
  • Unexpected Character: He originally appeared in Gaunt's Ghosts First and Only, but he shows up in the Eisenhorn Trilogy. Eisenhorn's series explains Heldane's strange equine appearance in First and Only. The "Where Are They Now?" Epilogue is a Call-Forward to his death in First and Only.
  • Villain Ball: His eagerness to obtain the Iron Men STC machine causes him to accidentally reveal part of his true motives to Gaunt through Fereyd. This causes Gaunt to declare that he will destroy the machine forcing a desperate Heldane to have Fereyd attack Gaunt's party. However, he didn't prepare a failsafe in case Fereyd was killed. This leads to him suffering from psychic feedback. To be fair, though, the pain from his fatal wound made him careless.
  • Well-Intentioned Extremist: While he was originally a Puritan, his philosophy eventually changes. He believes that the Imperium must use Chaos against Chaos. He believes that "white" can't beat "black", but that "grey" can beat "black". He believes that Warmaster Macaroth is too pure and that Lord Militant General Hechtor Dravere would be a better leader for the Sabbat Campaign as he is willing to take more audacious risks.
  • Why Don't You Just Shoot Him?: Subverted in Xenos where Heldane shoots a psyker who was weakened after he forced a wall into revealing the location of the Saruthi Necroteuch.

Leonid Osma

Another Malleus Inquisitor; he's introduced as head of the Ordo Malleus' branch in the Ordos Helican in Malleus, and becomes Grandmaster of the entire Ordos Helican partway through Hereticus.


An infamous Inquisitor of the Ordo Malleus, Quixos was once held up as an exemplar of his Ordo by other Inquisitors before he began to dabble with the powers of Chaos and fell from grace. He vanished hundreds of years ago, and was assumed dead by his peers. In reality, he's very much alive and very much a renegade...

    Imperial Citizens 

    The Forces of Chaos 

Murdin Eyclone

Also called "the Recidivist," Murdin Eyclone is a heretic who acts as a mercenary, selling his services to various Chaos cults. Eisenhorn tracks him down on the planet Hubris and kills him at the beginning of Xenos.

  • Posthumous Character: In many ways. He dies quickly in the first chapter of Xenos, but most of what Eisenhorn and company do for the remainder of the trilogy is shaped, or at least initiated, by the clues they picked up from Eyclone.
  • Starter Villain

Pontius Glaw

An infamous heretic who was killed more than two hundred years before the events of the first book; while his physical body was slain, he lives on as a preserved consciousness inside an arcane device called "the Pontius".


A Chaos Space Marine of the Emperor's Children; works with the Glaws to recover the Necroteuch in Xenos.


A powerful daemonhost, who takes a keen interest in Eisenhorn as the series goes on...

  • Affably Evil: Straddles the line between this and Faux Affably Evil a lot. He speaks in a friendly familiar manner to Eisenhorn whenever they meet, despite the fact that he is always going to be doing something murderously evil.
  • The Chessmaster: His reason for ensuring that Eisenhorn is pulled into Inquisitor Quixos' plans was the foreknowledge that Eisenhorn would be the one to free him from Quixos' control. This backfires when it turns out that Eisenhorn doesn't appreciate being used.
  • Demonic Possession: A weaponized one for several owners.
  • Humanoid Abomination: It's at least hinted that the chaos entity possessing him is a Daemon Prince.
  • Time Abyss: One acount states that he plagues the galaxy for thousands, if not millions of years.