Here's tonight's update! While testing colors, I came up with jade as an interesting material for the mask and legs "armor". A friend made me notice how the "oni" mask may look a bit evil (my goal was to convey anger) so I think I should find something to replace the horns, or simply remove them. I tried to compensate with the pastel colors and light, but I'm not sure if this is working well.
What are your take on this? I'm interested to know.
Note to self: Once I start to paint details, I should try to avoid stiffness.