The Sunken Witch! It was pretty fun making this character feel like she fit the theme of the overall moody looking town. We went ahead and create player armor from this, which didn't take too much time to modify to work with our character system.
Concept artist, Mahealani, created a cool environment for the miniboss version of the witch to fight in. See her concepts for this here, and scroll down to the last few images: https://www.artstation.com/artwork/dKYKkA