Things You’ll Need

• Google Gemini Nano Banana
• Character reference images
• Character names + short visual blurbs
• Basic idea of poster composition

Step 1: Open Nano Banana

• Open Google Gemini Nano Banana
• Start new image generation session

Step 2: Upload Character References

• Attach image references of the characters you want in the poster
• Any image that clearly shows a single character will suffice. You do not need a formal character design reference sheet.