Described as more of a bully than a mastermind, Rough is ferocious, impish and cruel. He takes great pleasure in mocking the unfortunate and treating those he has terrorized into servitude like his personal slaves. He is also arrogant with an inflated sense of self, and does not take kindly to those opposing him. He is also very vengeful, as seen when he assured Sonic and Knuckles that they had made "lifelong enemies" of out of him and Tumble after they defeated them.

Like Tumble, Rough has displayed a quirky sense of showmanship: for introducing themselves, the skunk brothers have prepared a routine where they tell about themselves with a rhyme while striking flashy poses. Rough is particularly proud and protective about their routine, as he got greatly offended when Sonic and Knuckles imitated it (in a mocking manner no less).

Since there are no canonical voices for him yet, I'm imagining a little punk trying to sound big and tough.