Nano Banana Character Consistency: Keep the Same Face

Nano Banana is one of the best image models at keeping a character consistent, as long as you give it a clear reference and ask for it. The key ingredients are good reference images, a prompt that names what must stay the same, and small changes per step.

How many references each model takes

Google’s documentation gives these limits per request:

On Nano Banana AI each model accepts up to 4 images per request, which covers most character work.

A workflow that keeps faces consistent

1. Start from a clean reference. A sharp, well-lit, front-facing photo or drawing of the character.
2. Make a character sheet. Ask for front, side and back views on a plain background. Use it as the reference for every later image.
3. Name what must not change. “Same face, same curly red hair, same green jacket.”
4. Change one thing per image. New pose or new place, not both plus a new outfit.
5. Edit the last good image when you build a sequence, rather than starting from scratch each time.

Prompts that help

• “Use the character from the first image. Keep the face, hairstyle and outfit identical. Show her reading in a library.”
• “Create a 2x2 grid of the same character in four scenes, with identical face, hair and clothing.”
• “Character sheet: front, three-quarter, side and back views of the same character, plain grey background, labeled views.”

The Nano Banana Pro prompts page has more of these.

What breaks consistency

• Low-resolution or heavily filtered reference photos.
• Big changes in one step: new age, new outfit, new style and new place at once.
• Switching models halfway through a series.
• Very small faces in wide group shots; Pro holds them better than the Flash models.

Which model to use

Nano Banana 2 is fast and handles up to 4 characters. Nano Banana Pro handles up to 5 characters plus style references and keeps small details more reliably, which matters for comics, storyboards and brand mascots.