Half portrait drawing with pink ball point pen

Hello everyone, i am here to share a new drawing with ball point pen. This is a drawing of a girl's face but only half of it is seen because the other half is hidden behind her hairs. I really like this kind of concept because it looks so cool.
Now that i have already uploaded it, i think i should have used some blue color into it, for the darker parts, like the eyebrows and pupil of the eye.

Here are some process shots:

Reference image used for this drawing.