I may be reading too much into it, but is it a hint of actual interest from her in Nan Hao? I say this because she drew him first. Like using him as the core of the drawing and the rest as just context.
@Yiledute I believe so too, since she draws Nao a lot. It's almost as though she isn't sure whether to want Nao for herself or ship him with Sheng, since that miscommunication several chapters ago led her to believe the boys are a couple. Their dynamic obviously fascinates her.
Was she using a fucking Kukri to sharpen her pencil? She sure is the StuCo Prez's sister. Also the fish pillows on her bed were surely placed in an "interesting" position.