Rockingham is a 33-year-old teacher of White English Canadian heritage. He has brown hair and light grey eyes. He wears a light grey suit with a white-and-silver striped tie, and he is nearly always seen carrying a suitcase in his hand, just like the protagonists of the show Dartmouth and Jollimore. He is Boulderwood's twin brother, and the two are often seen together.
- Rockingham may have been so named because of his twin brother Boulderwood; a boulder is a large rock.