Erin scanned a personality book that was lying on the dormitory floor earlier before she picked it up, and she found a page where there were Patronus meanings. If this was somehow your personality, likely, but not accurately, the animal on the other side would be your Patronus. But she knew that Patronus did not reflect personalities. They usually turn out to be what you think could protect you at times that you needed it so much. One you could trust your life with.

"...independent, clever, curious, unpredictable, free thinker, organizer, seeing the unseen..."

Those were for the cat meanings.