Dead Central: You mentioned the Erik Kripke character, but which major character on the show has the most “you” in it?

Eric Kripke: I would say it would have been Chuck. Chuck has always been my surrogate on the show. He is a writer with a really low self-esteem and spends a lot of time working in his pajamas.

Source: Creator Eric Kripke Discusses The Essential Supernatural: On the Road with Sam and Dean Winchester https://www.dreadcentral.com/news/39978/creator-eric-kripke-discusses-the-essential-supernatural-on-the-road-with-sam-and-dean-winchester/

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Lynn: You were essentially cast as the creator, in multiple definitions of the word. It’s weird enough that you were cast as God, but you were also cast as Kripke! When did you realize that you were symbolizing both of these iconic figures?

Rob: When I first got the part, it was Prophet!Chuck, and I knew that I was representing the writers, because it was their chance to sort of speak on episodes they’d written that they didn’t really like, like oh my god I can’t believe you had to go through that! The ghost ship episode (Red Sky At Morning) was one I think he talks about -- they were like, I’m so sorry about that! I feel like it was the writers’ chance to apologize to the fans and it’s their commentary on their own show, which I love. I mean, what other show does that? So it was his way of going, these are the characters I created, and I’ve wanted to say these things to you. But I always thought I represented more the team of writers when I was the prophet. Then when I got that final episode I was in, I didn’t even realize what was necessarily going on until I got up to Vancouver and I was shooting it and it was kinda like, you know, is this what I think it is, that I’m God?? And Kripke called me and was like yes, it is what you think it is, and this is what’s happening, but he didn’t lay it out there that you’re me specifically. Then it was while shooting that last episode, and it’s called Swan Song and it’s his final episode, his love letter to the show, taking himself out of it in this sort of very poetic kind of way, and that’s when I was really like OMG, I’m Kripke, I’ve been Kripke this whole time!

Jensen Ackles | JIBCon 2011