Robert Burridge calls them "skins". There is gold oil paint from a paint pen that I used to dot in a few stars in the sky and a little highlight (at least in my brain) around the figure, so does all of that make this a mixed media painting? Hmmm, could be!
The sideways or diagonal affect is almost Bauhaus, I think. Maybe I'm making things up again, my brain does that too!
Have a great day!