Sly is a cunning, devious, quick-witted, charming, suave, gentleman thief. He uses his wit, courage, charm and skills to pull off jobs, and often crack jokes and sarcastic comments at the expense of others. Sly is also very cool, collected and manages to keep a rational head in stressful and chaotic situations. Despite being slick with the comebacks, his girlfriend, Carmelita Fox, becomes increasingly infuriated with him, especially during their travels through time. Through all of his hardships, he remains loyal and dedicated to any he calls his friend, especially his lifelong friends, Bentley and Murray.