Sonic is best known for his speed, since of course he is the fastest thing alive. Across green hills, Sonic is honest, keeps his promises, and always cracks a joke. Every once in a while, he’s very upbeat and carefree, but also reckless at times. He thinks ahead before walking right into danger. Sonic’s love interest is Amy Rose. Of course, he can’t live a day without her, or else he would probably go insane.Of course, he can’t live a day without her, or else he would probably go insane.