"I need to protect Laios, Falin, and the others... I must protect them...!"
Since this is my first time trying to train a character with multiple hairstyles and outfits this experiment turned out a bit flawed.
There are several issues with some of the hairstyles. Either they don't work or got polluted too much with the others. Since Marcille canonically changes her hairstyle constantly this can be a good thing and you can experiment with the different triggers. That's why I included them, but made you a list with my experiences so far:
You need the prompt alternative official hairstyle except for her Twinbraids.
Her hair styles and how stable they are:
HairTwinbraids - stable - her usual style
HairLowTwintails - stable
HairLongOpen - stable
HairSingleBraid, crown braid - mostly stable
HairFoldedPonytail - mostly stable, but it seems it didn't learn the folded part.
HairLowPonytail - not stable
HairHalfupHalfdownBraid - not stable
Her winter outfit only works half, hence the 2½ in the title. lol
It didn't learn the correct color nor the fur-trim. I'll probably try a new training in the future to fix this and maybe the failed hairstyles.
Merging her with Elf Senshi could work to get the correct winter coat!? Idk...Didn't try it but if someone does let me know how it turned out.