How to modify AI generated objects, preserving its look?

When I've generated an object with Firefly's "Text to Picture" AI, and when I'm very satisfied with the result - how can I modify that object preserving the same style or "look"? Or, how can I generate another picture of same or similar overall style, containing the previously generated object? To give an example: When I've made Firefly generating a fantastic animal, I would like to generate very similar pictures, with more animals of the same type for example or with that animal in another pose or with another background.

That way, I could make a picture story, focussing on a main object. (Regenerating a picture with slightly modified text doesn't work.)

I would appreciate any hint.