Chestnut wears a red dress-type clothing, and blue shoes. Like the other people in Phong Gi, his brown hair is in the shape of a mushroom top.
Chestnut gives the following puzzles in Professor Layton and the Azran Legacy:
"An impatient young man who is easily led astray. Though he spent a whole week thinking of ways to make the chief laugh, he failed to come up with a single good idea. He really does look like a turbo-charged mushroom when he dashes through the jungle!"