This is Comet (コメット) from mobile game "Azur Lane (アズールレーン)"
手游《碧蓝航线》的角色“彗星“
The v0.5 version can use a single prompt, “comet \(azur lane\), ” to trigger both the character and the costume. However, it always causes a comet to appear in the background, so I still recommend v1.0, where I expanded the training dataset to make it more flexible.
=====Prompt=====
Basic:
cometazl,ahoge,Retrofit outfit:
twintails,white hat,hat ribbon,side slit,choker,plaid skirt,blue skirt,frilled skirt,long sleeves,puffy sleeves,white thighhighs,