Norwegian Wood cover sketch

Here's a quick sketch I did a few months ago from the cover of Haruki Murakami's Norwegian Wood. It's not great but I just thought I'd post it, as I haven't posted any pencil sketches for a while. Apparently the photo is by Markus Klinko & Indrani. I'm not sure which of the characters from the book the photo is meant to portray. I guess it's too young for Reiko, so I suppose it's either Naoko or Midori. Any ideas?