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Writer's pictureDanny McKeever

8 Steps to Building Unforgettable NPCs Using AI Tools Like ChatGPT, DALL-E 3, and The Gamemaster Platform

Updated: Nov 4

8 Steps to Building Unforgettable NPCs Using AI Tools Like ChatGPT, DALL-E 3, and The Gamemaster Platform

Non-Player Characters (NPCs) can turn a D&D game from routine encounters into something players remember for years. With AI tools like ChatGPT for text-based interactions, DALL-E 3 for generating unique images, and The Gamemaster Platform for keeping track and storing all my game information, allowing for NPCs become vibrant and relatable.


Listen to AI converse about this blog - very insightful!



Let’s walk through a quick approach to crafting NPCs with AI, packed with practical prompts and tips to make them stand out.



1. Start with Their Purpose

NPCs are in the game for a reason. Are they quest-givers, allies, merchants, scholars, or even spies? This starting point grounds their interactions with players and gives them direction in the story. An innkeeper may simply offer a place to rest, but a mercenary has a stake in the world’s conflicts. Knowing this will guide how you present them and what motivates them to engage with the adventurers.


Purpose Examples: Quest giver, ally, merchant, mentor, healer, informant, spy, antagonist, diplomat, guard, entertainer, scholar, blacksmith, priest, innkeeper, ranger, thief, noble, mercenary, shopkeeper, traveler, emissary, rebel leader, guide, storyteller, recruiter, enchanter, mapmaker, potion master, artifact collector, seer, beast tamer.


2. Choose an Archetype

Archetypes bring a sense of familiarity to characters and can subtly cue players on what to expect. Classic archetypes like the Hero, Outlaw, and Caregiver can serve as a backbone, making it easier to layer in personality without starting from scratch.


Archetypes help players immediately grasp the essence of an NPC, making them more approachable and interesting.


12 Archetypes to Consider


3. Add Memorable Traits

Defining unique physical traits and quirks gives players something to latch onto. Maybe your NPC is a pirate who hums out-of-tune shanties or a blacksmith who refuses to work in silence. These quirks add flavor and make interactions memorable.


With AI, you can experiment with various character traits until you find one that makes the NPC feel distinct.


Memorable Traits to Consider


4. Develop Their Relationships and Backstory

Relationships and past experiences influence how NPCs interact with the world. A village healer who once lived among royalty will carry herself differently than a self-taught herbalist from a forest. These elements reveal motivations and hints about their personality.


Even brief glimpses of an NPC’s past can create unexpected emotional connections, adding layers to the story.


Backstories to Consider


5. Define Motivations and Goals

Giving NPCs clear motivations makes their actions and decisions more predictable for the players, which can add authenticity to the interaction. A blacksmith might join a rebellion if he sees the ruling class abusing power, making him not just a background character but an active force in the story.


When motivations align with players’ actions, it adds natural tension and realism to the storyline.


Motivations and Goals to Consider


6. Signature Phrases and Dialogue Style

Crafting an NPC’s personality with signature phrases and distinct dialogue styles is key to making them memorable and lifelike.


Using a few signature phrases helps give the NPC a recognizable voice, allowing players to become familiar with their habits and expressions.


Develop a Few Signature Phrases

Use Dialogue and Conversation



7. NPC Profile: Prompting with ChatGPT

Purpose: To generate an NPC Profile that you can save for your next session. This profile can be fed into any AI tool to "train" that tool on the NPC. I use The Game Master Platform to save, train, and remember my NPCs for all of my sessions.


Prompt Process

This is a two-step prompting process that will use the PCTET (Persona, Context, Task, Example, Tone) method. This method allows you to give AI enough information to create an NPC that fits seamlessly into your world.


This prompt structure provides the AI with the essential elements to create a cohesive NPC.


Note: [brackets] are there to identify where you need to update the content.


Prompt 1: Training the AI

Read this page and reply with "Ready to Create an NPC!" https://www.the-enchanted-scribe.com/6-steps-npc-creation


Prompt 2: NPC Profile Template:

Persona: You are a GM looking to create three unique NPC [innkeepers] for a D&D encounter, each with distinct backgrounds, motivations, and personalities.

Context: The [innkeepers] should fit within a [medieval fantasy setting and serve travelers, adventurers, and townsfolk, but each one brings a unique atmosphere to their inn.]

Task: Generate three fully realized [innkeepers] with diverse roles and personality traits, making each one suitable for a variety of role-playing encounters with players.

Include the following details for each:

  1. Name

  2. Purpose and Archetype [[Innkeeper] who is a [The Caregiver, The Outlaw, The Sage]].

Description with memorable traits, including physical appearance and unique quirks or habits.

  1. Relationships and Backstory (e.g., key relationships, notable past experiences.)

  2. Motivations and Goals (e.g., short- and long-term goals, conflicting motivations, or emotional triggers).

  3. Signature Phrases [e.g., short phrases that the NPC uses during normal conversation}


Example: For example, an innkeeper who embodies the [Jester] archetype, quick with jokes and stories, with a habit of drinking with customers; or a stoic innkeeper who’s a former mercenary and sees the inn as a haven of peace.

Tone: The tone for each innkeeper should reflect their archetype, whether friendly, secretive, humorous, or wise.

Template:

Name: {NPC Name}

  • Archetype: {Selected Archetype}

  • Description: {Physical appearance, personality traits, and unique quirks or habits}

  • Relationships and Backstory: {Past relationships, key experiences, reasons for running the inn}

  • Motivations and Goals:

    • Short-Term Goal: {Immediate objective or task}

    • Long-Term Goal: {Aspirational goal or ultimate desire}

    • Conflicting Motivation: {Secondary motivation or inner conflict, if any}

  • Emotional Triggers: {Specific situations, actions, or topics that evoke a strong emotional response}

  • Signature Phrases: {3 Specific phrases that the NPC uses in their normal flow of conversation}

  • Dialog: {Write a short dialog between this NPC and a player, reacting to a Player’s Condition or Experience}


---End Prompt---



Note: This prompt is already built for your NPCs in The Gamemaster Platform. With a click of the button, you can generate an entire NPC profile.


8. Visualize with DALL-E 3

Images add a powerful layer to the NPC experience, allowing players to envision the characters they interact with. Using DALL-E 3, you can create visuals that capture the mood and unique traits of each NPC, deepening players’ connection to them.


Take the NPC description from your template and use it to prompt DALL-E 3 to generate images. Experiment with different art styles to see which best brings out each character’s personality and ambiance. With AI-generated images, you can bring NPCs to life in a way that enhances immersion and leaves a memorable impression on players.


NPCs Elements to Consider

Image Styles to Consider


Prompt Image Template: Generating Images for NPCs

Prompt:

Persona: You are a GM who is developing a unique [innkeeper] NPC for a D&D RPG encounter.

Task: Create for me 3 unique [innkeepers] descriptions. The goal is to provide the GM with a highly detailed description for each NPC. Focus on visual elements.

Example:

Name: [Innkeeper Name]

Description: [Use the description from the previous prompt]

Body Language and Personality: How do they carry themselves? Describe their body language, demeanor, and any habitual gestures or expressions.

Environment: Set the scene of the inn, including lighting, smells, background elements, and any atmosphere that matches the innkeeper’s personality. Use these traits to make the [innkeeper] memorable and add personality to the setting.

Tone: The image should be in a [fantasy] style


Note: The Gamemaster Platform has a built-in image generator for your NPCs.


Example NPCs

Garron Stonebrew


NPC Profile

Image Description for DALL-E3



Lira Willowshade


NPC Profile: Lira Willowshade

Image Description for DALL-E3


Rowan “Rumble” Tacker


NPC Profile: Rowan “Rumble” Tacker

Image Description for DALL-E3


The Gamemaster Platform Process


When I create an NPC in The Gamemaster Platform I follow these steps.

1) I copy and paste the description into the overview section and run the image generator to make the NPC portrait.

2) I update the overview with additional bullet points that I am interested in the NPC having, I click Save.

3) I click on NPC Profile which reads the input in the NPC and generates for me an entire background that I can save into the overview.


Below is Rowan "Rumble" Tacker that is ready to be added to an encounter.


For each campaign I keep a list of my important NPCs. I also create default NPCs that I can use over and over in my campaign.



Bringing NPCs to life in a D&D campaign transforms a game into a memorable storytelling experience. By defining an NPC’s purpose, building their personality, crafting a backstory, and using AI tools like ChatGPT, The Gamemaster Platform and DALL-E, Game Masters can create rich, layered characters that players connect with and remember. Each NPC, from the innkeeper with a hidden past to the mercenary with a fierce loyalty, becomes more than just a background figure—they become part of the world and story. With these techniques and tools, GMs have everything they need to create vibrant, engaging characters that truly elevate the game.

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