Originally Posted by
ResidentSeagull
After looking at it a bit I also think it might be her, but I feel like if that really is her then the design is gonna be at least slightly different.
What makes me say that are the things on her shoulders, which I can only assume is some kind of fur collar, which the Case Files manga version lacks.
The silhouette also seems to be wearing a poofy down-to-your-feet dress (I'm sorry I don't know fashion terminology), whereas the Case Files manga version is wearing a weird down-to-your-ankles dress that only covers the backside.