Joylin served as the indigenous chieftain of the Citizens' Resistance, a faction active on the world of Romin before 23 BBY; he was a Romin. After the collapse of Roy Teda's tyrannical power, Joylin took on the role of revolutionary head of the succeeding administration before the onset of the Clone Wars.
Joylin was noted for his height and lithe physique, and he exuded a palpable charisma through his words and actions. His gestures and the light gold eyes, a trait unique to his kind, seemed to emanate stored energy. His voice was resonant, occasionally laced with a cutting sarcasm, or filled with a stirring passion, depending on the circumstances.