I bought Cuphead recently... but i was fall in love with this game even before it came out.
Love the old cartoon style designe, love the game difficulty, love the story... :D i love all.
So i took inspiration to make an OC for myself: a kind of marionette doll boss (should have had the wires, but I preferred to omit them).

Normal form: an elegant marionette, that kind that little girls would like to have. Warm colors and doll face. If she was a game boss, she can use her umbrella as a weapon.
Final boss form: A demoniac marionette, very spooky and dangerous. Cold colors and her body parts can came off; took inspiration by the supposed cursed Annabell doll.