PONY XL:

Strength: 0.7-0.8

Keywords: hud_gth_drss, black heart patterned short dress, white collar, white wrist cuffs with o rings, long sleeves, white lace socks, black boots

You can also look at my sample images for prompt ideas, as I toggled some keywords on/off or omitted some on some photos which led to diff types of effects.

SD 1.5:

Strength: 0.6-0.8

Keywords: hud_gth_drss, black heart patterned short dress, white collar, white wrist cuffs, long sleeves, white lace socks, boots