She's got a light brown vest with child-sized name and logo patches and a green harness. Her collar is black leather with yellow electrical tape (I couldn't resist a little bit of caution striping) and a rubber logo key chain tag. The tag is a little big, and I think I'll eventually replace it with a metal key chain instead.
Now she needs some kind of equipment. I thought about going the cute route and making her a mini proton pack (would look great strapped to her back with that green harness, right?) but I'd like something more realistic (within the Ghostbusters world at least). I was thinking a trap sitting on her back might be the best option. Anybody got other ideas?