http://johnaugust.com/2014/scriptnotes-ep-128-frozen-with-jennifer-lee-transcript
Wow for any fan of the film I suggest you give this a read, fantastic interview with jennifer lee giving a huge insight to the creative script process of the film.
Personally my favorite line from the interview
At what point did Hans become a villain? And, I mean –
Jennifer: [laughs] Hans is a villain from the minute he hits her with the horse, in my mind.
Aline: Really?
Jennifer: But I am slightly a sociopath, I think. He’s just calculating from that moment.
So, I had to literally walk through every scene, what’s going on in his head for real, and at least I could — like when he says, the first time when he finds out she’s princess and drops to his knees. Before that she’s just a girl. But the key moment is when she says, “It’s just me.” And he goes, “Just you?”
And that’s like inside he’s going, “Ooh, you don’t think very highly of yourself, do you? Well, I’m gonna…”
Aline: Terrific. Great news for a narcissist.
Jennifer: It’s all very sick and twisted deep down.
John: But clearly he’s a very talented sociopath.
Jennifer: He’s very talented. He’s charming. He mirrors everyone. And actually the original story had a lot to do with mirrors. And in many iterations of the story we talk about mirrors and we bring them up. And so I held on a little to that, what Hans is is a mirror as a lot of charming, but hallow or sociopathic.
Aline: That it’s like she’s falling in love with her reflection in the pond, yeah.
Jennifer: Yeah, exactly. And he mirrors her and he’s goofy with her. He’s a little bit more bold and aggressive with the Duke, because the Duke is a jerk, so he’s a jerk back. And with Elsa he’s a hero.
And it seems in earlier drafts olaf was mean and well Jennifer Lee didn't like him read on
Jennifer: The thing about Olaf is he was by far, for me, the hardest character to deal with. And I say that because when I came on, when I went to see a screening, people are going to hate me, when I saw the screening — I wasn’t on the project yet — every time he appeared I wrote, “Kill the f-ing snowman.” I just wrote kill him. I hate him. I hate him.
And part of it was, you know, we didn’t have Josh yet. And that’s a huge thing, obviously. And it wasn’t the scratch artist, he was great, but it was that he was — he wanted to be a shoulder because Elsa had these guards. He was half-good and half-bad. He was acerbic. He was a little, I don’t know, he just was kind of mean at times. And I didn’t know why he existed and I didn’t like him.