I'd been wanting to create a new series of girl face artworks featuring a monochrome+single accent colour palettes- these are the results. Please with out they turned out. Not sure about the Pikachu one though, but perhaps still an idea worth testing? They gave me an excuse to use Photoshop a little differently that I usually do- to effectively paint digitally using a variety or brushes rather than produce my more typical digital airbrush colour effects with a generic low-flow round brush.
See below for 'Hand print', 'Spidey', 'Hannya', 'Skull', 'Biohazard' and 'Butterfly'.