A few months back I made this sketch depicting Chocolate and Soul Choco as Nagoriyuki and Eddy from the Guilty Gear universe. Sigma then took the sketch and made the coloured version below as practice.

Redesigning the mask to fit Choco's rabbit features and tweaking Soul's appearance to mimic Eddy's were both fun exercises, and I think Sigma did an excellent job of bringing my rather loose gestural sketch to the next level.