Once again here's an obscure waifu from a game that most people don't care about.
I found my PSP a few days ago and was reminded of this game and how much I liked Serene so here we are now.
Pony Version:
Standard outfit/look Prompt: serene_riviera, short_hair, blue_capelet, wings, white_coat, black_bodysuit, black_headwear, bandages, std_outfit
Note: The headwear has bandages on it so currently omitting bandages will give a different kind of hat.
SD1.5:
Prompting:
Standard outfit: serene_\(riviera\), blue_capelet, white_coat, black_bodysuit, black_headwear, bandages, short_hair
If you want anything else putting "black_headwear" in the negative prompt might be needed. Everything else seems to generally not show up unless prompted.