Here’s a gouache painting of Micki from Smithson. The spiral shape was a recurring visual motif; it showed up as a big sculpture in the middle of campus (which all the students sat on, naturally) and on a pachinko machine in one episode.
Someday I might make a post featuring all the appearances of another visual motif, a guy with big sideburns that I would put into the foreground of crowd scenes to establish depth. (I called him Ray Poussoir.)