Painting for Cenia, my wife's undead/lich character. This is only one of her forms. Inside of her chosen puppet is a Zengre, which looks like a little mechanical ferret controlling the form with buttons and levers.
'Cenia absorbed some basic engineering knowledge from her sister, Cassandra, but didn't actively participate in the construction of Zengre until after her own "accident". She was born a white ferret with black eyespots and markings. When she lost her body in an accident, Cassandra bound Cenia's soul to a Soul Ruby implanted in one of her Zengre, which Cenia then uses to control a larger mechanical or skin to serve as her puppet. Any time Cenia's puppet breaks down, she can simply crawl out and find a new one, if the old form is too much trouble to repair'.
You can read more about Cenia here - http://nimbaterra.com/cenia.html