You generate the perfect character — the face, the outfit, the vibe all land. Then you try to make a second image of them and they come out as a stranger who happens to have the same hair color. This is the single most frustrating problem in AI image generation, and it blocks anything that needs a character to appear more than once: a comic, a character sheet, a set of profile pictures, a game's cast.
The fix isn't one trick. It's a stack of three techniques that each reduce drift, and used together they hold a character steady across a whole set. All of it runs in Imageny's image generator.
Why do AI characters change between images?
Every generation starts from noise and rebuilds the image from your prompt. A text prompt describes a character loosely — "brown-haired girl in a red jacket" fits thousands of different faces. The model picks one at random each time, so unless you pin down more, image two draws a different girl who also fits the words.
Consistency, then, is about narrowing what the model is free to reinvent. Three levers do that, from weakest to strongest.
Does a detailed character description help?
Yes — it's the foundation, even if it isn't sufficient alone. A vague description leaves the model too much freedom; a specific one narrows the range of faces that fit.
Write a fixed "character block" and paste it into every prompt unchanged:
a 20-year-old woman, sharp green eyes, shoulder-length silver hair with straight bangs, small scar on left cheek, red bomber jacket over a black shirt, silver hoop earrings
Specifics like the scar, the exact hair length and bangs, and the earrings act as anchors — distinctive details the model latches onto and reproduces. "Silver hair" alone drifts; "shoulder-length silver hair with straight bangs and a small scar on the left cheek" comes back far more reliably. This is the same wants-over-traits precision our character creation guide recommends for personality, applied to appearance.
Keep the block identical every time. Changing even a word ("crimson" instead of "red") invites drift.
How do I use a reference image to lock a character?
This is the strongest lever, and it's the one most people never reach for. Once you have an image of your character you're happy with, use it as a reference image in the playground instead of describing them from scratch again.
A reference image shows the model the exact face, palette, and design rather than approximating them from words. Now your prompt only needs to describe what's different in the new image — the pose, the setting, the expression:
- Reference the approved portrait, prompt:
same character, three-quarter view, looking off to the side, soft window light - Reference it again, prompt:
same character, full-body, standing pose, plain studio background
Because the reference carries the identity, you spend your prompt on the variation instead of re-rolling the whole person. This is exactly the workflow that makes a set of anime PFPs or a sprite set hang together — the reference is the throughline.
What workflow produces a consistent set?
Put the three levers in the right order and the process becomes repeatable:
- Generate the hero image first. Iterate until you have one image that nails the character. This is your source of truth — spend real time here, because everything else is built on it.
- Write the character block from that image, capturing its distinctive details in words.
- Use the hero as a reference image for every subsequent generation, with the character block in the prompt as backup.
- Change only one variable at a time — pose, then angle, then setting. One change per generation keeps the identity stable and tells you exactly what caused any drift.
- Batch and pick. Generate several candidates per pose and keep only the ones that match. Consistency is partly a numbers game: the closest match out of four beats the first result out of one.
The mindset shift that helps most: treat your first great image as an asset you protect, not a one-off you'll casually recreate. Everything downstream references back to it.
Build your character's first set
Open the playground, generate one image you genuinely love, and write down its distinctive details. Then use it as a reference to make a second pose — same face, new angle. If you're building a character to talk to as well as to look at, publish them to the characters directory so the identity you locked in carries into every conversation. Free credits are included when you sign up.
Cover photo by sarandy westfall on Unsplash.