Holy $!#t, This took me way longer than I thought.
I thought " just splice a raptor head in a human body, throw some cloth on top and print it"
I had to make heavy changes to the head to fit it to my purposes. So much that there is not an original vertex on the head.
Making the robes and cloth was easy. But making a water tight solid from a single side geometry that folds eight times on itself was hell.
I learned two tips that might save you lots of work.
1- Microsoft 3D builder is your friend. This software can make a water tight geometry from the most clipped, open, and overlapping geometry ever.
2- If there is no other way, you can create a geometry from photogrammetry. Just put a wacky, flat texture on the model (a 3D fractal with colors), animate a camera around your model, render 1000 frames from that camera, and use those frames to reconstruct the geometry with photogrammetry.
The result is not perfect, but is a realy good core to use in Microsoft 3D builder to fill all those creases in the cloth.
The head was created using the thing "Jurassic Park Velociraptor statue" by Granat as a reference, with permission from its author.
I will add a reference pic of the best orientation to print each part.