Sorry, took a while to get back to this.... I've kind of been running around like a chicken with it's head cut off. *sigh*
The tail is a large chenille stem (sp?) that usually is attached via magnets to his clothes. I'm still debating on doing what K2 does, and physically attaching it to the interior spine.
As for the cute little blond kitty girl? That's Yukiko, and she's the 40cm Alice from Parabox. Uber adorable, and a dirty little thief.
I've found that normal 7-8 wigs fit nicely on the stock 50cm head. My Alice also takes a 7-8.
<3
-Kiki-chan78