Original not required, but please check it out!
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!