An edit I did for myself, with the help of a few friends through the process. I removed the head wings, as I simply wanted the tail, and applied it to the chocobo egg ring to be equippable on the lady Giraffes :3
You WILL need a skeleton base to make this not stiff as a board in game. I'm not personally sure what all works as far as IVCS goes but I did use Saenomae's movement pack for Fem Elezens, and it works well for me. Tail will just need to be a higher prio than the movement pack. Moving Female Elezen Tail Animation Pack - https://www.xivmodarchive.com/modid/77623
Many many immense thanks to my friends Soleil and Kon <3
Primary File or Link:
[Cordie] Charon Tail on Ring -Elezen Fem-.pmp : [ via Direct Download ]