Question: Have any of you ever read any of the books from the series "His Dark Materials" by Philip Pullman?
If the awnser is yes, then hooray! You'll know what I'm talking about! If it's no, here's a link to a brief(ish) summary of the three books that make up the series.
Anyway, in the books, there are things called daemons. They take the form of animals, and are an external representation of one's "inner self".
So, I had an idea.
What if Ponies had something similar?