DualMegami/WhatAboutGifts

I've done away with them. I didn't like them--though I know other people did.
If you really want something like them (and want to use my revisions), here's a suggestion. (Bear in mind this is a suggestion only and should be revised as you see fit).
If your player desires some sort of physical enhancement--wings and limbs come to mind--I'm certainly alright with allowing a permanent Beastman-Transformation enhancing charm.
I recommend the following guidelines:

• Functions only when in specific BT
• should correspond to one of the caste attributes
• increases the visibility of the Tell
• should have an Essence requirement no higher than 3, and shouldn't be terribly world-shaking.

I highly, highly advocate using Charms instead. There are plenty of Charms in the Lunar book that function very well. Yes, some of them need a little tweaking, but that's something that you as a player or ST should work out on your own.....or pester someone else with more time to do.