Upload & Sell: On
This is a great question. I would love to have this assignment. I agree with Charlie; I would discuss it directly with her. I think it may also depend on how the photos are to be used. If it's a thumbnail for a printed program, I might opt for a more straightforward approach. But if it's for publicity, or a magazine profile, it presents an opportunity to really present who she is as a performer and a blind person. Thoughtful, interpretive portraiture is a real skill. It requires the photographer to really understand the person and the story she and you want to tell. So you need to know two things: what's the purpose of the shot, and what story does she want to tell (if any) with these images.
For inspiration, I'd take a look at some photographers who are very, very good at this sort of thing: Joe McNally, David Hobby, Greg Heisler, and Joey L (Joey Lawrence) come easily to mind.