she's a little frightening around the eyes, but holy! that's good shading...

The work done on a lineart is your own.  It's just like a comic book process where up to five people might contribute to a piece of work.  A writer provides the story, but also might provide some rough thumbnails, a penciller sketches out the piece leaving room for inks/colors/letters, the inker drops in the inks and then the colorist and letterer put in their work.  Each new stage of development (writing, thumbs, pencils, inks, colors, letters) has "ownership" of the work as a whole at the point they work at it and shared ownership to any derivative works. Obviously this is not a "business" argument I'm posing (ownership of art can belong to anyone), but what I believe to be a fair creative perspective. 

Regarding the artwork... the coloring around the right eye and forehead is extra spiffy.