Caroline Thompson based Edward on her border collie mix she had when she was in college. "When I was 18, I took this dog to college with me, and she had a presence and a character. I swear to God if she had a larynx, she would've talked. I mean, she was that involved in my success. She was everywhere I was, sitting next to me and enjoying everything I was enjoying, but not able to quite do it because she was a dog. And that's how Edward is. He's just sort of like, 'Uhhh, OK I want to be here, but how?'"