Why not compose it so the the inks stand on their own merit?
Here, because of the tonal scheme (gray-on-gray, or white-on-white) the girl blends into the buffalotaur, instead of standing out against it, which she would do if you framed her with contrasting tones. Sure, the colorist will do that, now. However, I am curious why you didn't take charge?
While the different parts are drawn nicely, especially the female figure and top half of the creature, the compression of space in the arrangement from this angle conceals much within the boundaries of the creature's silhouette, the silhouette itself becoming ambiguous on lower left side. Between that and the lack of contrast to separate the girl, it doesn't pass the postage stamp test. (i.e. when reduced to 1"x2" or, about the size of a postage stamp. one should be able to get the gist of it.)
(Please don't confuse my thinking about the drawing critically as lack of appreciation. Just the opposite. Had it not caught my attention in a good way, I would never have thought to consider it, carefully. )
I admit I'm not the best at spotting blacks, still something I'm learning. I thought about adding more blacks to help her pop but thought it wouldn't look as good that way, and it'd look better if the colorist separated the two with color.