🛠️ For the DM

Improv NPC Toolkit

Warhammer 40,000 One-Shot — DM Reference

How to use this: Flip to any table when you need an NPC on the fly. Roll once on each table, combine the results, and you have a fully playable character in 30 seconds. The pre-baked NPCs at the end are ready to drop in with zero prep — just grab one and go.

A note for the DM: You will always need more NPCs than you planned. Players talk to guards, interrogate prisoners, and befriend merchants you invented as scenery. This toolkit is your safety net. Every roll combination here will feel like it belongs in the 41st Millennium.

TABLE 1 — Hive-Worlder Names (d20)

These are the common citizens, soldiers, and functionaries of the Imperium — people born into industrial mega-cities who have never seen a sunrise that wasn't filtered through smog. Their names carry echoes of High Gothic, corrupted Latin, and a thousand years of linguistic drift.

Roll separately for given name and family name (or use a single name — many hive-workers have no family name worth keeping).

Given Names

d20	Male	Female
1	Vektus	Lyra
2	Harkon	Senna
3	Dravec	Mira
4	Tollus	Vael
5	Brutus	Ilyse
6	Caddick	Tamara
7	Oryn	Brynn
8	Sedrek	Orthia
9	Joln	Cassia
10	Marwick	Deva
11	Tarn	Servela
12	Huxley	Pettra
13	Oblus	Renna
14	Grevval	Kael
15	Sefton	Marta
16	Dunn	Aelyn
17	Craetus	Throne
18	Yael	Vorka
19	Marchetti	Alisen
20	Rho	Erris

Family Names

d20	Name	d20	Name
1	Cael	11	Vorn
2	Throckus	12	Harwick
3	Meck	13	Sulvar
4	Draven	14	Yost
5	Pallus	15	Crennick
6	Golt	16	Thresh
7	Warris	17	Duskfell
8	Kettrick	18	Umber
9	Vael	19	Hatchett
10	Morvus	20	Oln

TABLE 2 — Military Names & Titles (d20)

Imperial Guard officers favor rank-inflated names and regimental titles. Many adopt the name of their homeworld regiment or a legendary predecessor. A soldier who has served 30 years may introduce himself only by rank and a numerical designator — names are a luxury that gets you shot if said at the wrong moment.

Military Given Names

d20	Name	d20	Name
1	Krauss	11	Rennick
2	Vasil	12	Obrecht
3	Thorn	13	Jarrek
4	Morvec	14	Callis
5	Fenwick	15	Starn
6	Grael	16	Kovac
7	Tullian	17	Haas
8	Dorn	18	Vance
9	Marchetti	19	Breck
10	Tayne	20	Galven

Military Titles & Designators

d20	Title / Honorific
1	Sergeant-at-Arms
2	Colour-Sergeant
3	Vox-Sergeant
4	Trooper First Class
5	Conscript-Primus
6	Veteran Guardsman
7	Forward Operator
8	Platoon Commissar
9	Lieutenant-Castellan
10	Medicae Orderly
11	Weapons Specialist
12	Scout-Corporal
13	Designated Marksman
14	Heavy Weapons Operator
15	Vox-Caster
16	Regimental Standard-Bearer
17	Combat Engineer
18	Field Sanctionist
19	Tactical Advisor (seconded)
20	Acting Captain (sole survivor of officer corps)

TABLE 3 — Noble & Administratum Names (d10)

The ruling class of the Imperium uses baroque double-barrelled names, honorifics, and hereditary suffixes. A noble who introduces herself as simply "Lyra" is either very informal or very dangerous. Their names are intended to intimidate.

d10	Noble Name
1	Lord-Seneschal Vektor Drenn-Malkus
2	Arch-Countess Semia Vaure of Pallus-IV
3	Administratum Magister Tullian Creth
4	Hereditary Governor Oswin Holt-Careyne
5	Lady Aelindra Sothis-Vael
6	Arbitral Overseer Renn Brackus-Holt
7	Commissariate Envoy Mira Draven-Throne
8	Ecclesiarchal Factor Pious Kettrick II
9	Rogue Trader Warrant-Holder Cassia Meridian
10	Sub-Commandant Yael Orvus, Retired (Dishonoured)

TABLE 4 — Mannerisms & Physical Quirks (d20)

Layer one of these onto any NPC for instant texture. These are visual and behavioral details the players will notice and remember — they don't require explaining, just enacting.

d20	Mannerism / Quirk
1	Constantly touches a battered Imperial rosary or aquila pendant — lips moving silently in prayer
2	Right eye is a cheap augmetic — it whirrs and clicks slightly when focusing
3	Speaks in a near-whisper at all times, forcing listeners to lean in
4	One hand is missing and replaced with a crude metal hook — they use it casually as a tool
5	Taps two fingers on any flat surface (table, wall, leg) in a rhythmic pattern while thinking
6	Refers to the Emperor in every other sentence, unprompted: "Emperor willing," "Emperor damn you," "the Emperor knows I've tried"
7	Smells powerfully of incense, promethium, or lho-stick smoke
8	Enormous, deep scar running through one lip — distorts their speech on certain consonants
9	Laughs too loud and too suddenly, then cuts it off like a switch flipped
10	Maintains exactly three feet of personal space; sidesteps if someone closes it
11	Carries a data-slate they can't actually read — just holds it for status
12	Refuses to give a straight answer; everything is phrased as a question or a proverb
13	Obsessively checks their chronometer every few minutes
14	Half of their hair has burned away; the rest is long and unkempt
15	Speaks about other people as if they aren't in the room, even to their face: "Does she understand what I'm saying?"
16	Always eating — scraps of hardtack, a single lho-stick, dried meat from a pouch
17	Bows slightly whenever they hear the Emperor's name — almost involuntary
18	One leg drags slightly; they've learned to walk fast despite it
19	Deeply uncomfortable with open spaces — keeps pressing toward walls
20	Writes everything down in a worn leather journal. Everything.

TABLE 5 — Voice & Speech Patterns (d20)

Read the one-liner, adopt the cadence, and you'll stay in character. These are simple enough to sustain under fire.

d20	Voice & Pattern
1	Clipped and military. Short sentences. No filler words. Ends statements with a declarative period. "Answer the question. I don't repeat myself."
2	Preachy and slow. Every sentence is a small sermon. Long pauses for emphasis. "The Emperor... does not grant second chances... to those who waste the first."
3	Nervous talker. Speaks quickly, trails off, circles back: "The thing is, I mean, what I'm saying is, look, I'm not saying anything, I'm just—"
4	Dry and exhausted. Flat affect. Has seen too much. Slight dark humor. "Oh, they're dead? Hm. That's unfortunate. Third squad this week."
5	Falsely cheerful. Smiles at wrong moments. Terrible news delivered brightly. "Wonderful news! Only three of you died in the breach."
6	Formal and bureaucratic. Cannot stop using jargon. "Per Munitorum Requisition Form 7-Alpha-Delta, I am authorised to inform you that—"
7	Conspiratorial hush. Constantly looking over their shoulder. Always leans closer mid-sentence. Rarely says names. "You didn't hear this from me."
8	Noble disdain. Slow, elongated vowels. Every sentence implies you're wasting their time. "Is that... supposed to mean something to me?"
9	Street-level brawler. Rough accent, incomplete grammar, vivid slang. "Throne, yeah — that thing was big, I'm not gonna lie to ya."
10	Religiously fervent. Interrupts themselves with blessings and curses. Quotes Imperial scripture at semi-relevant moments.
11	Stilted and mechanical. Possibly has too many augmetics. Speaks like someone who learned language from a manual. Literal. No idioms.
12	Overly polite. Everything is "if you don't mind" and "I do apologise" — even while doing terrible things.
13	Heavy accent from a feral world. Unusual word order. Archaic vocabulary. Treats anything technological with visible superstition.
14	The negotiator. Everything is a deal. Can't resist adding "and what do I get in return?"
15	Philosophical and detached. Responds to urgent situations with vague observations about life and death. "We are all dust in the Emperor's eye, yes?"
16	Barking and loud. Speaks at volume even when quiet is called for. Swears prolifically. Hard to embarrass.
17	Insinuating. Never says what they mean directly. Everything is implication. Loves letting a silence hang.
18	Pedantic. Corrects others constantly on small details. Gets momentarily lost correcting a minor point mid-emergency.
19	Warm and folksy. Uses nicknames immediately. Calls everyone "friend," "brother," or "love." Makes terrible situations feel almost homely.
20	Quietly terrifying. Almost no change in expression or volume, ever. Calm announcement of horrible things. "I will need to remove your hand. Sit still."

TABLE 6 — What They Want (Motivation) (d20)

Every NPC needs one thing they want right now. This drives how they react to the players' requests, what favors they'll grant, and what price they'll extract. Keep it simple — one clear want makes improv easy.

d20	They Want...
1	To get out of this place alive and never come back
2	To find out what happened to their squad / their family / their unit
3	Proof that a rival did something wrong — enough to ruin them
4	Safe passage off this world or through this district
5	A debt paid — someone owes them and they're tired of waiting
6	To be believed about something they witnessed that everyone else denies
7	To complete one final task before they die (and they know they're dying)
8	Power over someone specific — they want to give an order and have it followed
9	Information about what's really happening here — they've only heard rumors
10	Protection for someone they care about (a child, a comrade, a contact)
11	To destroy something or someone — but they need help getting close enough
12	Money (Throne Gelt), supplies, or a specific item they've been promised
13	To be noticed — to matter to someone with authority
14	Absolution — they did something terrible and the guilt is eating them
15	Revenge for a specific wrong, committed by a specific person or faction
16	To delay or derail the players until someone else arrives
17	To recruit the players into something they won't reveal until they trust them
18	The safety of a sacred place, relic, or idea — they'll sacrifice anything to protect it
19	Simply to do their job and be left alone — they want out of this conversation
20	To confess — they've been carrying a secret that's become unbearable

TABLE 7 — Secrets (d20)

Secrets are the DM's best tool for making NPCs feel real. Drop one hint through a mannerism or a strange reaction — let the players dig. These are all spoiler-safe and plot-neutral; they add flavor without requiring you to plan around them.

d20	They're Hiding...
1	A minor mutation — nothing dangerous, but the Arbites would execute them for it
2	They survived something that should have killed them — they haven't told anyone how
3	They are not who their papers say. The real person is dead; they took the identity to survive
4	They owe a substantial debt to someone very dangerous
5	They witnessed a heresy (a real one) and reported nothing because they were afraid
6	A psyker gift they've never told anyone about — small, imprecise, terrifying to them
7	They are a spy or informant for a party not represented in this room
8	They sabotaged something recently — not out of malice, out of desperation — and it cost lives
9	They don't actually believe in the Emperor. Haven't for years. They perform devotion perfectly
10	They know where something valuable (or dangerous) is hidden and have told no one
11	Someone they were supposed to kill is still alive, and they let them go
12	They have a family they've hidden from their organization, because attachments are a liability
13	They take orders from a second authority that contradicts their apparent loyalty
14	They are blackmailing someone above them in rank — mutually assured destruction
15	They carry a message or object they don't understand but were told to deliver at any cost
16	They've been in contact with xenos — not hostile contact; something stranger and more complicated
17	Their faith is entirely real, but it's not in the Emperor — it's in something else entirely
18	They're the one who opened the door / gave the signal / looked the other way — and the current crisis is partly their fault
19	They are dying. Slowly, from something internal. They've told no one and intend to die at their post
20	They know what this operation is really about — the actual orders behind the stated objective

PRE-BAKED DROP-IN NPCs

Eight fully-formed NPCs, ready to deploy. Each one can appear in almost any scene without plot dependency. Grab the sheet, pick a voice from Table 5, and run them.

NPC 1 — SERGEANT KRAUSS VAEL

Role: Grizzled Imperial Guard sergeant, 22 years of service, sole survivor of the 14th Harwick Infantry's 3rd Platoon

Voice: Clipped, military, exhausted. Short sentences. No sentiment. If something is wrong, he states it as a fact and immediately asks what you're going to do about it.

"Fourteen of my men went into that corridor. Three came out wrong. I don't recommend going in."

What he wants: A mission with a clear objective and a realistic extraction plan. He has watched too many operations fail because someone in command was lying about the intelligence. He doesn't want bravery — he wants competence.

Secret: He has a letter in his breast pocket from the regimental Commissar, authorizing him to shoot any officer who orders a tactically suicidal advance. He's used it once. He keeps it sharp and ready.

Useful for: Military briefings, escort scenes, establishing the stakes of a fight, any moment that needs someone to say the unsayable truth about odds of survival.

Demeanor in 30 seconds: Stands at parade-rest automatically. Makes eye contact with whoever is speaking and holds it. Doesn't laugh. If you ask him something he respects, he answers immediately.

NPC 2 — ADEPT TECHA-7 ORYN PALLUS

Role: Low-ranking tech-adept (Adeptus Mechanicus), seconded to a Munitorum logistics team; responsible for a warehouse of misfiling machine components he doesn't understand

Voice: Stilted, literal, unable to manage idioms. Speaks in monotone with occasional machine-whirr on breath. Cannot stop annotating everything verbally.

"Your inquiry is... logged. I estimate a 73% probability that the component you describe does not exist in my inventory. I will search. The search will take time. You should not watch me search."

What he wants: The return of a specific piece of equipment that went missing three days ago — a cogitator housing bearing the stamp of his Forge World. He cannot report it lost. It was his responsibility. He's been awake for seventy hours trying to locate it through favors and trade.

Secret: He is not fully sanctioned. His augmentations were installed by an unlicensed tech-priest on a fringe world — functional, but if anyone checked the serial markings, he would be recalled and potentially dismantled. The anxiety of this has made him scrupulously honest about everything else.

Useful for: Technical exposition, navigating bureaucracy, acquiring equipment, comic relief with genuinely useful payoff.

Demeanor in 30 seconds: Enters slightly ahead of where his path requires. Catalogues everything in the room with subtle eye-tracking. Offers information in exchange for very specific things.

NPC 3 — CASSIA MERIDIAN

Role: Licensed Rogue Trader, holder of an Warrant of Trade dating back six generations; currently operating a "legitimate resupply operation" that is obviously something else

Voice: Smooth, unhurried, aristocratic warmth that somehow makes everything feel like a business negotiation. She finds dangerous people charming until they bore her.

"I trade in probabilities, not certainties. You're asking me to take a risk. I'm asking you to tell me why that risk is worth my while. Take your time. I have excellent wine."

What she wants: A manifest — a shipping list, an inventory, a set of authorization codes — that someone on this world is refusing to release. It doesn't matter what's on the manifest. She was paid to retrieve it, and she does not deliver failure.

Secret: Her Warrant of Trade is genuine; the family name is not. The Meridian line ended four generations ago when the last legitimate heir died in debtor's prison. She purchased the rights and the name from a corrupt Administratum clerk, and has spent a career making the fiction true through sheer audacity.

Useful for: Offering transport, brokering information, providing a morally ambiguous ally with her own agenda, any scene that needs a sophisticated NPC who will clearly betray someone eventually.

Demeanor in 30 seconds: Occupies whatever space she's in as if she chose it specifically. Never seems surprised. Offers things before you ask for them. Every favor has a price she hasn't named yet.

NPC 4 — CONFESSOR VRAEL

Role: Ecclesiarchy confessor (traveling preacher), attached to no permanent congregation; self-appointed spiritual advisor to whoever needs him most

Voice: Preacherly and theatrical, with a genuine warmth underneath the fire. He quotes scripture often — and usually correctly. He can make you feel watched by the Emperor in a way that is either comforting or suffocating depending on your guilt.

"The Emperor does not demand that you be unafraid. He demands only that you act. Fear is the Warp's first tool. You choose whether it stops you."

What he wants: To find what he calls "the splinter of heresy in this wood" — a vague conviction that something spiritually wrong is happening here, not just militarily. He has no proof and admits it. He simply knows, the way certain people always seem to know, and he will not leave until he finds it.

Secret: He has witnessed a genuine miracle — an event with no rational explanation — and his faith has not grown stronger from it. It has grown stranger. He's been trying to determine for three years whether what he saw was the Emperor or something pretending to be.

Useful for: Delivering lore about the Imperial Cult, creating moral pressure on characters, foreshadowing Chaos or daemonic presence, adding spiritual weight to stakes.

Demeanor in 30 seconds: Greets everyone as a potential penitent. Stands too close. Makes you feel like confessing things you haven't done wrong. Laughs warmly and genuinely at unexpected moments.

NPC 5 — KETTRICK (no other name offered)

Role: Hive-sump information broker; knows who moves what through the lower levels; has exactly zero loyalties and precisely one price

Voice: Street-level, fast, conspiratorial. Never makes direct eye contact. Everything is phrased as a hypothetical. He refers to himself in the third person when nervous, which is always.

"Kettrick doesn't know what you're talking about. Kettrick has never heard of that person. Kettrick is, hypothetically, someone who might know where a person matching that description buys their breakfast. Hypothetically. That'd be worth something, wouldn't it."

What he wants: Off this level. Not the planet — just this level of the hive. Someone has marked him for something he knows but won't say, and the corridors he used to own don't feel safe anymore. He'll trade almost anything for armed escort to the mid-spire transit station.

Secret: He has a name in his head that he won't say out loud. It's the name of the person who runs the operation the players are (presumably) looking into. He knows it. He came close to dying for knowing it. He will give it up if he believes the person offering protection can actually deliver.

Useful for: Exposition dumps delivered in character, pointing toward the next lead, comic tension, demonstrating how the information economy of a hive works.

Demeanor in 30 seconds: Arrives early and picks the seat with the best sight-lines. Orders nothing. Knows what you're going to ask before you ask it, which he finds exhausting.

NPC 6 — ACTING-LIEUTENANT MARTA THRESH

Role: Imperial Guard officer, three weeks in command after her entire officer corps was killed in an ambush; barely holding her platoon together through force of personality and a complete refusal to admit she's terrified

Voice: Falsely certain. Gives orders like someone who knows exactly what they're doing and will fall apart the moment she's alone. Refers to contingencies she hasn't actually made.

"I have that situation in hand. I have had it in hand. My soldiers are... handling it. What I need from you is not your concern, it's your cooperation."

What she wants: For someone with more authority than her to either take command or confirm that she's doing it right. She's been waiting three weeks for either and neither has arrived. She will not admit to needing this.

Secret: She ordered a retreat on the second day that may have cost the lives of the platoon she left behind in sector Gamma-7. She hasn't told anyone. She doesn't know yet if they survived. She can't bring herself to find out.

Useful for: Leadership scenarios, moral complexity around duty and failure, as a competent-but-cracking allied officer, giving the players a command structure to work within (or around).

Demeanor in 30 seconds: Stands perfectly straight. Speaks quickly. Checks her platoon's position in the room involuntarily every few minutes. Hates silence — fills it with plans.

NPC 7 — SISTER AUXILIAR TEVA DORN

Role: Combat medic attached to an Adepta Sororitas (Sisters of Battle) delegation; technically a healer, practically a soldier who happens to carry bandages

Voice: Warm and practical, with the unnerving calm of someone who has held people's hands while they died so many times that death has simply become a procedure to be managed.

"That wound will kill you in about four hours without treatment, two hours if you keep moving. So. Do you want the lecture, or do you want me to fix it? I can do both but it takes longer."

What she wants: Survivors. Not victory, not glory — people alive at the end. She measures every decision by body count and she is quietly furious at anyone who increases it unnecessarily.

Secret: She carries a mercy-dose of sacred sedative: enough to kill one person painlessly. It is meant for soldiers who cannot be saved and are suffering. She's carried it for six months without using it. She doesn't know if she's saving it for a specific person or if she simply can't bring herself to.

Useful for: Healing between scenes (without making it feel like a video game), providing warmth and humanity in a brutal setting, a moral anchor, or a character who forces difficult triage decisions.

Demeanor in 30 seconds: Assesses everyone's physical condition immediately upon meeting them. Doesn't react to gore. Is uncomfortable receiving gratitude — deflects it back to the Emperor.

NPC 8 — ARCH-NOTARY OSWIN CRETH

Role: Senior Administratum bureaucrat — the man responsible for this district's supply authorizations; theoretically a minor functionary; practically the person whose signature you need for everything

Voice: Impeccably formal. Slow, precise. Every sentence contains at least one Latin-esque Administratum term that he does not explain. Politely devastating.

"I understand your urgency. I also understand that Requisition Form 7-Alpha has not been submitted, and that Form 7-Alpha precedes Form 7-Beta, which precedes the authorization you believe you already have. These forms exist for a reason, Lord Inquisitor. The reason is efficiency."

What he wants: For the correct forms to be submitted in the correct order. That's not deflection — that's actually what he wants. He derives genuine satisfaction from systems functioning correctly, and genuine offense from systems functioning incorrectly. He can be moved by sufficient authority, but it must be documented authority.

Secret: He has been embezzling supply authorizations for sixteen years by routing them through defunct regimental accounts. Not for personal gain — to fund a small archive of banned literature he considers culturally essential. He has never read most of it. He just can't stand the idea of it being lost.

Useful for: Blocking the players' progress with paperwork, providing a comedic bureaucratic obstacle, delivering important information in the most inconvenient possible format, surprising players with unexpected depth.

Demeanor in 30 seconds: Always has a data-slate. Always knows which form you need. Treats chaos and crisis as administrative problems requiring the correct response protocol. Genuinely helpful once you meet his standards.

QUICK-COMBINE REFERENCE

When you need an NPC in ten seconds, roll twice on Table 4 and once on Table 6, pick a voice from Table 5, and assign a name from Tables 1-3. The combination will always work. Example:

Name: Harkon Meck (Table 1 roll 2 / roll 3)

Quirk: Has a battered augmetic eye that whirrs when focusing (Table 4 roll 2)

Voice: Dry and exhausted, flat dark humor (Table 5 roll 4)

Want: Wants safe passage off this world (Table 6 roll 4)

You now have a world-weary, half-augmented survivor who greets the players with "You look like people who know how to get somewhere quietly. I'm interested in that skill." He's immediately playable, immediately interesting, and requires zero prep.

IMPERIAL FLAVOR PHRASES

Drop these into NPC speech when you want to sound like you've been running 40k games for years. No memorization needed — keep this page open.

Situation	What an NPC says
Swearing / frustration	"Throne of Terra!" · "By the Golden Throne!" · "Emperor's teeth!"
Disbelief	"Holy Terra." · "Blessed Omnissiah." · "What in the warp—"
Dismissal	"That is not the Emperor's concern." · "I don't have that kind of time."
Requesting action	"In the Emperor's name, move." · "The Emperor asks this of us."
Insult (light)	"You glorified conscript." · "Walking servitor." · "Void-born idiot."
Insult (heavy)	"Heretic." · "Traitor." · "Mutant." (These are extremely serious in this setting — use them to escalate tension)
Approval	"As the Emperor wills." · "Honour to your regiment." · "That will suffice."
Greeting (formal)	"The Emperor protects." (The correct response: "The Emperor protects.")
Farewell / good luck	"Walk in His light." · "Die well." · "Don't make my report longer."
Shock at the supernatural	"That's — that's warpcraft. Kill it." · "Sanctioned psyker, I hope."
Bureaucratic dismissal	"Submit the appropriate form." · "That is outside my mandate."
Grim acceptance	"Well. That's how it is, then." · "There are worse ways to serve."

This toolkit is spoiler-safe and plot-neutral — every table, NPC, and phrase here can be dropped into any scene, any one-shot, any campaign in the 41st Millennium. Roll freely. Run confidently. The Emperor protects.