[SOLVED] Hairs Incompatible w Most Bodies

So both of my hairs here work with the default female/male body presets in game, but if you use any body sliders the hairs distort.

Here's the only in-game presets they work with:
 

This is what both hairs are supposed to look like / what they look like with the one body preset they work with:



And here's... well...









At first I wasn't going to do anything about it for the Edelgard hair since I figured it was just because of how the mesh is, but seeing that I got this problem again with my Sylvain hair made me realize that this is a Me problem lol.

I know its an issue with the weighting for certain Vertex Groups, but removing vertex groups or trying to edit it hasn't solved the issue for me? Or at least not fully or it caused different issues. Maybe theres a specific set of vertex group(s) that I need to get rid of, but I dont know which ones or if its related to something else?

Here's the blender projects if anyone wants to try to help
Edelgard Blender File
Sylvain Blender File

And the .package files just in case that's the issue?
Edelgard .package
Sylvain .package

Note that the textures for the Sylvain (second) hair isn't done in the second blend, please don't worry about that I just need help with weights and vertexes if its not a problem
I'm still very new at this so I apologize!! Sorry for the bother and thanks in advance!! ;;