Parcelle is a postman who posts in London, Dropstone and Folsense. This raises suspicions to Professor Layton. He makes a quick escape each time Layton approaches him about it. Later on in the game, word spreads that a person has been taken to Herzen Castle. As soon as Layton and Luke approach the castle, they see Parcelle running out of the door.
Parcelle wears a matching navy blue postman suit and a hat. He also carries around a red backpack.
Parcelle gives the following puzzles in Professor Layton and the Diabolical Box:
"This bold mail carrier is based in Dropstone but fearlessly delivers letters as far away as Folsense. Parcelle is known for his positive attitude and dedication to the job. His motto is "Delivering smiles, one letter at a time."