Helena Blavatsky from Fate Grand Order.

I've said this on other models, but then again, just to clarify, you dont need to put all this on the prompt. What I put here is the exact formula you get that costume exactly as they are. You can not include what you dont want and you can also switch pieces if you want.

Just take these as reference of the pieces. For example, her coat on the main costume responds to "black coat" while her coat in the swimsuit version responds to "trench coat, sleeveless", her vanilla tighs work with "black thighhighs" while her swimsuit version responds to "Thigh Strap, black thighhighs" there is the "black boots" and there are the "laced boots"

This is so you can exchange stuff more easily. For example give her the swimsuit coat and the swimsuit tighs but with her vanilla dress instead of the bikini.

But all of this is ONLY if you want to play dressing dolls. You can just put "strapless dress, thighhighs" and call it a day and it will lead towards her main costume without more details.

That being said, this is the reference formulas for 1:1 costumes

EXAMPLE PROMPTS:

Core traits: 1girl, purple hair, short hair, purple eyes

Asc1 black dress, strapless, hair bow, belt, detached sleeves, white sleeves, frills, black thighhighs, black boots

Asc2 black dress, strapless, beret, belt, detached sleeves, white sleeves, frills, black thighhighs, black boots

Asc3 black dress, strapless, beret, belt, black coat, open coat, bare shoulders, off shoulder, frills, black thighhighs, black boots

Swimsuit2 swimsuit, hair ornament, white bikini, bridal gauntlets, revealing clothes, white Thigh boots

Swimsuit3 ponytail, swimsuit, black microbikini, black gloves, trench coat, sleeveless, garrison cap, Thigh Strap, black thighhighs, laced boots

Santa blue dress, fur trim, blue hat, blue gloves, blue coat, winter clothes, red ribbon, pantyhose, blue boots