Diamond.

Why not?

I'm not a big fan of tail items, I just use them to complete outfits.
But I would like to see a skull tail, that'd be kinda cool. :3
Or maybe just a feather for a tail, like the kind of feather you can put in your hair:


Btw, person in picture isn't me. I took it off Google.

My favorite is the moon tail, but I do wish there could be a cookie tail... COOOOKIES

The diamond and black ribbon looks nice