Pretty much exactly what it says on the tin. Technically works for Echo as well, but it has bones for stomach scaling and was fitted for Resonance in mind specifically.
I did my best to mitigate clipping and mesh separation (and breaking), but it may still occur with certain C+ scalings/idles/animations/etc. C+ is on in preview. Also the Ephemerist's Robe is used for a lot of mods; if you have any conflicts, the textures on the skirt may not show up as originally intended regardless of priority!
Let me know if there are any major issues, otherwise I hope you enjoy!