A few months ago I was looking for volunteers to make an animation viewer from the assets of this game.
I've found nobody, so the best I could cobble together alone is now in topic request limbo for ~4 days
here.
With the new unreal engine encryption things denuvo announced recently I'll most likely not be able to extract assets anymore, so I don't plan to put in much more effort.
The unreal project that's included in the topic contains the animations for all 4 girls, not just Celia. If you're learning UE or just curious maybe it's worth a look. Or if a talented r34 artist could port the anims to Mercy or Ciri that would be great