Per class discussion, here are links to interviews with Craig Thompson, author of Blankets.
Craig Thompson at Meltdown Comics (this is the full video that we watched a clip from).
Craig Thompson transcript – Contents (this is the transcript to a lengthy interview with Thompson; part 7 includes information on Raina and his source of inspiration for her character)
If you liked Blankets, you might also enjoy:
Daytripper by Fábio Moon and Gabriel Bá (apparently Craig Thompson did the introduction!)