Derringer wears a black suit, with a white shirt and cream colored vest underneath. He also wears purple pants, brown shoes, glasses, and a purple hat. He has dark brown hair.
Derringer gives the following puzzles in Professor Layton and the Azran Legacy:
"A wealthy old man who likes nothing better than to let his hair down. Derringer made a fortune from Torrido's mines, before deciding to retire and focus on the good times. Despite his mischievous nature and habit of getting into trouble, he is actually a good person at heart."