How to create a character in ChatGPT and Gemini and preserve its appearance in all your images

If you want all your images generated by IA Tengan the same protagonist with consistent traitsHere you will learn how to do it step by step with ChatGPT y GeminiThe idea is to define a character, establish their appearance and style, and then instruct the AI ​​to remember them within the conversation so they can be used in different scenes without losing coherence. You can rely on... create 3D characters to complete the creative flow.

I propose several ways to achieve this: create the character from scratch with a description, start from a photo, or use an already designed image as a reference. Additionally, you'll see how to roleplay with that character in chats., how to save and reuse settings in Gems or GPTs, and a creative section to transform photos into collectible figures in the Bandai style with Gemini.

Before we begin: boundaries, style, and how ChatGPT and Gemini think

The first thing is to understand the playing field: generalist AIs apply moderation filters that can restrict certain content. Explicit scenes or extreme violence are usually rejected.Just like other sensitive topics that violate its usage guidelines. This won't prevent you from creating characters, but it's advisable to use appropriate frameworks.

Although both generate images and text, each has its own personality. ChatGPT and Gemini don't write or draw the same way.The narrative style, descriptive techniques, and visual fidelity vary depending on the model and version. It's worth trying both to see which best suits your needs, or comparing them with tools like use Bing Image Creator.

Another key aspect is context. Generally, memory is “temporary” and focuses on the active chat thread. To keep the character consistent, try to work within the same conversation. and "anchor" the protagonist's features as soon as you are happy with the initial design.

Whenever possible, specify the artistic style and level of detail you are interested in. If the AI ​​asks you to be more specific, respond with your preferred style. (e.g., comic, realistic, anime, editorial illustration, low poly) and any nuance of lighting, palette, or framing that helps you solidify a recognizable look.

Method 1: Define your character from a description

This method involves explaining to the AI ​​what your character looks like and requesting a first image with that design. Begin by stating the name and describe in detail their appearance and clothing.Next, define the desired visual style to ensure consistency in aesthetics from the start.

A practical way is to break the description down into parts. You can cover physical features, clothing, and distinctive details in an orderly manner so that the model does not overlook anything and unexpected changes between generations are minimized:

• Name and approximate age.
• Facial features (face shape, eyebrows, eyes, nose, lips) and hairstyle/color.
• Body type, height and usual posture.
• Main clothing and characteristic accessories.
• Artistic style (classic comic, anime, realistic, 3D, watercolor, etc.; see programs for creating comics).
• Color palette, lighting, framing, and point of view.

It's normal for AI to ask for more context: that's where you adjust the "tone" of the art and visual coherence. If you want a graphic novel or editorial illustration feel, say so clearly.and request the first image to validate the design. Don't be afraid to iterate, correcting details until it fits your vision.

Once you have a satisfactory image, ask that the design be set for the session. Something like "Anchor this aspect to the character" works well. And it confirms that from now on it will use that set of features and outfit when you request new images of the same protagonist.

From that moment on, you can request illustrations in different situations using the character's name. Clearly state that you want it and describe the scene (place, action, mood, lighting) so that the AI ​​maintains consistency of design and visual style between images.

Method 2: Create the character from a photo

Another option is to upload a reference image so that the AI ​​can "reimagine" the character. Select a clear photo, preferably a full-body shot if you intend to create it in different poses., and specify the changes: illustrated style, clothing adjustments, or extra elements you want to incorporate.

The process is simple: you upload the photo in the chat, ask them to turn it into a character with the desired style, and review the first generation. Then, request that this design be used as the basis for all images. of the conversation. Consistency from photos varies: in ChatGPT it usually behaves acceptably, and in some cases Gemini may be less stable with this method.

Once the design is approved, start generating specific scenes and actions with that character. If you detect deviations, emphasize the name and anchor of the aspect., and even recalls fixed elements (haircut, scar, glasses, tattoos) to reinforce continuity.

Important: Respect the privacy and limits of the platform. Gemini, for example, will not process photographs of real people without permission.Yes, you can work with your own images, original illustrations, anime/comic characters or objects, expanding the creative range without violating restrictions.

Method 3: Use a pre-existing image as a reference

If you already have a design created in another tool or by another artist, you can upload that image and use it as a guide. It indicates that, within this chat, all generations must maintain that character as the protagonist.This approach often works particularly well in Gemini with clear reference images.

From there, request new illustrations describing the scene, the environment, and the action. Reinforce the character's identity by mentioning their name and key attributes. Every few requests, if you notice stylistic drift, and make sure that each prompt explicitly refers to the use of the same digital persona.

If you alternate clothes or eras, mark the elements that never change (facial features, eye color, moles, distinctive accessories) and those that can vary (clothing, occasional hairstyle, props). This helps AI distinguish the "nuclear" from the cosmetic and maintain consistency between heterogeneous images.

Roleplay with your character in ChatGPT and Gemini

In addition to generating images, you can turn your protagonist into a character to talk to. The idea is to start a chat by adopting their voice, tone, and worldviewThis ensures all interaction is in the first person and "in character." Remember that moderation filters are still in place, so avoid scenarios that violate our policies.

For something quick, a brief description is enough: name, personality, and scene context. For example, it asks that she speak in a way that is consistent with her profile. And have them always respond as that character, without breaking the fourth wall. You can introduce them with a paragraph of background information and then have them respond in their voice.

"Take on the role of Lira Valden, a freighter pilot in an Outer Rim mining system. You're resourceful, direct, and have a dry sense of humor. Speak in the first person, keep your space slang, and stay in character. From now on, answer like Lira in all interventions."

If you prefer a detailed profile, define blocks: brief biography, personality traits, way of speaking, motivations, fears, and interpretation guidelines. It instructs them to respond in the first person and maintain the character at all timesAnd that, if the user asks to "step out of roleplay", the character reacts naturally within the fiction instead of admitting that it is an AI.

For the "stage" part, he encourages describing the environment with sensory and emotional brushstrokes, without losing rhythm. If you want actions highlighted, suggest emphasizing them with italics. using text in emphasisAnd remember to set content limits if you're going to explore sensitive themes or genres. This will ensure a smooth role-playing experience that's in line with your world.

Gems and GPTs: Save your character without repeating the prompt

Creating a Gem (in Gemini) or a custom GPT (in ChatGPT) allows you to encapsulate your character's instructions for reuse whenever you want. This way you don't start from scratch every time and you keep your profiles organized.Keep in mind that custom GPTs are a paid feature in ChatGPT, while Gems are available for free Gemini accounts.

With a Gem or GPT, you can include the character sheet, their visual style for images, and rules of behavior. Organize multiple characters as separate “profiles”so that you can start the one that corresponds to the story you want to continue or the aesthetic you are looking for in new images.

If you like working with documentation, some environments offer "projects" or space for attachments. Store there references to your universe, timelines, base images, and relevant previous dialogues.And mention them when you start a new thread so that the AI ​​has coherent context without straining the chat's memory.

Memory, context, and tricks to avoid losing coherence

AIs have context window limits and don't remember everything forever. The best practice is to keep the character on the same storyline.Reinforcing its "anchored" traits and name every few interactions. Reaffirm the fixed elements if you detect unwanted changes.

When you want to continue at another time, you can export the chat history, save it, and reuse it for reference. Including a character summary and examples of previous images helps a lot so that the system regains coherence in a new thread, even if it does not "remember" the previous conversation.

As for the art, being consistent with style and camera labels works. Repeat the aesthetic (e.g., "comic book style with clean ink and flat color")The type of lighting and preferred framing (close-up, medium shot, wide shot) are important when you want continuity. If the system offers "variations" or "editing" options, take advantage of them to refine the shot without losing the overall design.

Naming files and versions correctly also makes a difference. Save reference images with clear names (for example, “Character_Base_Name.png”, “Casual_Name_Red_Jacket.png”), so you will have the exact material you want to attach to future requests.

Extra creative: turn a photo into a collectible figure with Gemini

One trend that is taking off is transforming photographs into boxed "action toy" type figures. Gemini allows you to do this without having to payAnd with a couple of well-given instructions, the result is very striking.

Choose a good quality photo, preferably a full body shot with a clear pose. The posture and expression of the original image are usually transferred to the figureThis adds an extra touch of realism. It's also viable if you're working with pets or objects, and it can look very impressive.

Next, write a specific prompt. Here's a rewritten guideline for you to adjust to your liking. (replace the name in brackets and customize packaging and scene details):

«It generates a 1/7 scale figure Inspired by the person in the photo, with a realistic style. Place it on a desk and use a clear acrylic base without text. On the computer screen, display the digital model (ZBrush) of the same figure. Includes a Bandai-style product box with an illustration of the character and matching colors. The box should read:

When you send the prompt, make sure to attach the correct image in the chat. Activate the "Add Image" option and select the photo from the galleryThis way, the AI ​​will use that specific reference when composing the scene and will keep the features faithful.

From there you can customize. Change the scale (1/6, 1/8), alter the packaging palletIt modifies the background or the base material. More elaborate versions of the prompt, inspired by the packaging of popular manufacturers, often offer more spectacular scenes.

Regarding limits: Gemini does not work with images of real people without permission, in line with its privacy policy. Instead, he uses his own photographs or personal illustrations., drawn characters or even inanimate objects. With domestic animals the result is also very charming.

To refine results, take care with the starting photo: if part of the body is missing, the AI ​​can invent segments or reinterpret poses in strange ways. Avoid awkward cropping and prioritize well-lit imagesIf something doesn't fit, try variations or rewrite the prompt to strengthen feature fidelity and composition.

As you can see, combining the creative part with clear guidelines gives you a lot of control. Between anchoring the character design, leveraging Gems/GPTs, and working with referencesYou can maintain a surprising consistency in both images and role-playing conversations, without losing the personal touch that makes your protagonist unique.