sorry bout the jank bakushiiiiiiiiiiin
INFO FOR MIQO & VIERA:
for miqos youll still need to remove the vanilla ears by either using an earless 3d face or editing the textures, plus a mod that removes the ear fur from hairs.
heres a mod with the option for 3d-based or texture-based ear removal: https://www.xivmodarchive.com/modid/124039 and heres one for removing the ear fur off of vanilla hair: https://www.xivmodarchive.com/modid/62515 (not dt updated so youd need to run it through the textools updater first, but a good megapack of a majority of vanilla hairs). theres a bunch of other mods out there tho so use whatever you please
and for viera: in order to have the tail move you will need IVCS (documentation + dl link: https://docs.google.com/document/d/1yo-ynhqH-gMTN7SQv55x2yzOe_V2II9dSAJE8FnEghE) or YAS (included with yab (https://heliosphere.app/mod/yab) / rue (https://heliosphere.app/mod/rue), also available as a standalone mod under variants for yab) and a mod that gives your viera animations that use the tail.
my recs would be akasha's miqo'te emotes for viera (https://www.xivmodarchive.com/modid/60964) in combination with poccis' tail fix cutscene emotes + misc (https://www.xivmodarchive.com/modid/106965). if you want to keep viera emotes but with added tail motions theres saenomae's viera earwiggles and tailsway (https://www.xivmodarchive.com/modid/83052), but it looks a bit odd with the tail imo. theres a lot more out there so same as with miqo stuff, use whatever works best for you! most non-vanilla swap idles (juliext stuff for example) tend to have tail animations baked in as well