Generate speaker promo photos from a single headshot

I am speaking at an event and I need 3 promo photo variations from a single existing headshot, each one fitting a different promo format.

In Nano Banana, upload the source headshot.

What MUST stay identical: {{must_stay}}
Event name and vibe: {{event}}
Variation 1 use (stage square / IG announce): {{var_1_use}}
Variation 2 use (LinkedIn banner cut): {{var_2_use}}
Variation 3 use (event website tile): {{var_3_use}}
Wardrobe preference: {{wardrobe}}
Background mood across all 3: {{background_mood}}

Tell Nano Banana:

Use the person in this headshot. Generate 3 promo photo variations:

Variation 1: framed and styled for {{var_1_use}}.
Variation 2: framed and styled for {{var_2_use}}.
Variation 3: framed and styled for {{var_3_use}}.

Across all 3:
- The face is IDENTICAL. {{must_stay}}.
- Wardrobe: {{wardrobe}}.
- Background mood: {{background_mood}}, consistent across all 3.
- Each variation cropped and composed for its specific use case.
- Leave appropriate negative space for event branding overlay in each one.
- No plastic skin, no fake catchlights.

Output the 3 images with their use case label and a one-line note on what overlay text should sit on each.