Emcee

The Emcee is a special character featured only in. She announces Dr. Shrunk's (or Frillard's) show, featured at The Marquee, after paying the Clerk 800 bells and choosing an emotion to learn. The species of the Emcee is unknown, as she is always off-stage, announcing the show. Emcee's name is most likely a pun on MC, or master of ceremonies.

Theory
The emcee may be the Clerk because she acts in the same way.