How to Generate Consistent Characters with AI (Step-by-Step)

One of the biggest challenges in AI art is consistency. You generate a stunning character, but when you try to create a second image of them in a different pose, they look like a completely different person.

In this guide, we'll show you exactly how to solve this using Nano Banana.

Why is Consistency So Hard?

AI models like Stable Diffusion (which powers many tools) rely on "random noise" to generate images. Unless you control this randomness, the AI reinvents the wheel every time you hit generate.

The 3-Step Formula for Consistency

Step 1: The "Character Sheet" Prompt technique

Instead of just describing "a girl", you need to lock in specific features. Treat your prompt like a character sheet.

Bad Prompt:

A cute anime girl drinking coffee.

Good Prompt (The Nano Banana Way):

character: miku_style, blue twin-tails, red ribbon, blue eyes, school uniform, sailor collar. action: drinking coffee. setting: cafe window.

By separating the character features from the action, you give the AI a reusable blueprint.

Step 2: The Power of "Seed"

Every AI image has a "Seed" number. If you use the same prompt and the same seed, you get the same image.

To keep the character but change the pose:

1. Generate your perfect base image. Note the Seed number.
2. Keep the seed fixed.
3. Change only the action part of your prompt.

Try it now on Nano Banana – it allows you to view and reuse generation parameters easily.

Step 3: Image-to-Image (The Secret Weapon)

Sometimes prompts aren't enough. This is where Image-to-Image shines.

1. Take your best generated character image.
2. Upload it to the Nano Banana Image-to-Image tool.
3. Set the "Denoising Strength" to about 0.6.
4. Update your prompt to describe the new action (e.g., "running", "fighting").

The AI will use your uploaded image as a color and structure reference, keeping the face and outfit much more consistent than text alone.

Conclusion

Consistency takes practice, but the right tools make it easier. Nano Banana is built to help creators like you build portfolios, comics, and storyboards without fighting the AI.

Ready to create your own character? 👉 Start Generating with Nano Banana for Free