According to the website:
In the magical world of the Golden Compass, every person has a life companion in the form of an animal called a "Daemon." A Daemon is a cross between the soul and a best friend. The animal form it takes is a manifestation of the host's true personality.
From the link, click Meet your Daemon to take the test. Be sure to post your results in the comments!Link to the website
Wiki page about the movie