Pluto and Prosperina
This one took me a while to do as the ceiling was so blinking complicated to draw and my perspective lines didn't quite line up. (Note to self: avoid sketching arched ceilings in future.)
I've been trying a different approach with drawing figures recently; rather than starting with the outline of the figure, I start instead by drawing the negative space outside the figure and then fill in the details afterwards. How successful this approach is is up to the viewer to decide, but at the very least it makes the process of drawing a tad less predictable.