and-then-bam-cassiopeia:

I FOUND THE *COMPOSITE* QUOTE I FOUND IT i’ve only been searching for it for… months. idek anymore

Alan Arnold: When did you begin to write Star Wars?

George Lucas: It is difficult to pinpoint the moment when thinking about it evolved into actually putting it down on paper, but it was about 1973.

Alan Arnold: How did the characters evolve?

George Lucas: They all came out of one composite – Luke was the composite, which is another way of saying they came out of me.

Alan Arnold: You were the composite, your subconscious? 

George Lucas: I was dealing with two opposites, and these are the two opposites in myself – a naive, innocent idealism and a view of the world that is cynical, more pessimistic. My starting point was the idea of an innocent who becomes cynical. Should Luke be a brash young kid, or an intellectual? Should he be a she? At one point, I was going to have a girl at the center. Luke Skywalker might never have been; he might have been an heroine. Leia came out of Luke, so to speak, just as Han did, as the opposite of Luke. Han Solo evolved from my wanting to have a cynical foil for the more innocent Luke. A lot of the characters came out of Luke because Luke had many aspects. So I took certain aspects of the composite Luke and put them into other characters.

George Lucas interview, August 23rd, 1978, in Once Upon A Galaxy: A Journal of the Making of The Empire Strikes Back, Alan Arnold (p. 222-223)