Donald Moderate is a portly man with a long, hooked nose. He is missing his left hand and his right leg below the knee, replacing them with a metal claw and peg leg respectively. He wears dark purple trousers and suspenders over a white shirt with a frilly collar, as well as a blue bowtie, a pink jacket, and a tall and thin brown top hat with a bicorne-shaped rim.
- His name may come from the word "moderate", which as a verb can mean to preside over and control an event, fitting with his position as presenter.
- He is the third character that appears in the series with a pegleg, with Zeff and Shiki being the first and second respectfully, and is the first non-canon character who appears with one.