Like Angelique, Quesnel is blond with violet eyes. As a child, he dresses simply, to allow for the ease of movement while tinkering with technology. Alexia once described him as looking like a newspaper boy, complete with a paperboy's cap. His clothes are often covered in machinery oil. He is ten years old in Heartless. As an adult, at the time of Prudence, Quesnel is of medium build and height, with a round, boyish face. He is very coordinated and is described as moving like a dancer. He has an easy smile and loves to flirt.