For Rei I would love a Music box collar that has two compartments (The smooth places with borders around them). One she can put stuff in and the other that houses the music box itself. It will be metal like this bracelet: https://www.etsy.com/listing/207729607/s...=related-2 .. Just going around her neck instead.
Just ask before doing any actions that may cause a great deal of damage first.
I am also okay with being tagged.