You want a female changeling, crippled from the explosive ending of the invasion, but with tongue that would make Trixie look like a polite Canadian?
Number Sixteen, or Half-hearted Fury could be your companion for a while.

Or how about a changeling drone trying to survive on his own because he didn't make it to the invasion?
The boss could be found here, hobbling from the Badlands towards civilization.

Changelings? I like changelings!

You mean I get them at a discount?