Final answer:
Phyllis from The Office thinks Dwight is dressed as a monk for Halloween, but he is actually portraying Darth Sidious, a Sith Lord from Star Wars.
Step-by-step explanation:
The character Phyllis from the TV show The Office mistakenly thinks that Dwight is dressed as a monk during the first Halloween episode. However, Dwight is actually dressed as Sith Lord from the Star Wars franchise, specifically, Darth Sidious.