The sketches to show Negami's hair style change when she cuts her hair. I had actually had these two headshots drawn on different sides of the paper, traditionally, but I photoshopped it so that it could fit on one.

As you can see, her hair is about shoulder length and her eyes are wide, originally. She looks more child-like and fragile than when she cuts her hair. In the shorter hair pic she seems more cold, and her eyes are more narrow [kind of like how Light is when he gets all DeathNote crazy, did you notice the difference in his eyes, fellow DN fans?]