Hey there, BMJ.
I really like your lines here. Very clean and efficient.
I would maybe suggest not making the lines so dominant on some of her facial features however. The areas like the cheeks, the crease by her nose and her lips are very round, delicate features. (imo)They should be defined more so by light and shadow(tones) Not to say that you should remove the lines completely
Definitely think you can get more creative with the wings. I am not sure how you plan on finishing those off, but definitely think about creating a design you like, then working on just one side until you like it and then mirror the layer(to keep the symmetry of butterfly wings.) Keep at it!