• Original Outfit:

eliastellvt,
long hair, high ponytail, ahoge, pointy ears, blue eyes, headband, white ribbon choker, teal nails,
bathrobe, single off shoulder, sleeves past fingers, strap slip,
uneven legwear, purple kneehighs, purple socks, animal slippers

nightgown

Note that her nightgown gets generated by default, and adding the nightgown tag to the positive prompt will instead actually force the robe to be open. If you want to generate just the bathrobe without the underlying sleepwear, add naked robe to the positive prompt.

• 2nd Outfit (added in v2.0):

elia2ndvt,
long hair, high ponytail, gradient hair, ahoge, hairclip, purple nails,
choker, layered neck ribbon, jewelry, white shirt, emblem, long sleeves,
high-waist skirt, plaid skirt, gold trim, side slit,
white thighhighs, purple heels, footwear ribbon, ankle wings

coat