•That one ref'd drawing is [link]
•I get a lot of influences for Hana from photos of models but I'll point out that her bigger influences come from actresses like Kristen Stewart, Missy Peregrym or Kaya Scodelario and models like Jessica Stam. The main thing I look at when browsing pictures though is the hair and body language; those are the two things that I think make Hana who she is.
This model is a small example of some poses I'd like for Hana [link]
And here's some hair examples
[link] (<--pretty much looks just like Hana lol)[link]
Usually I pick up on pictures from tumblr. I'll scroll down and see something like this [link] and think, "Oh that sorta reminds me of Hana" lol