 Because series creator Eric Kripke wanted to keep the introduction of angels a secret, the character was described as a demon during auditions.Once Collins got the part, the main direction Kripke gave him of the character was there is "an otherworldly quality to the character, and that he hasn't been up close with human beings.He's been watching human beings from a great distance for the last two thousand years, so angels haven't been on Earth mingling with human beings for the last two thousand years.