Annabelle is described as a "leggy angel" with hot pink hair. She is constantly described as wearing hot pink attire. Her wings are a dark silvery, almost a pewter color. They are broad and muscular.
Annabelle initially passes herself off as Arriane's sister in Fallen. She plays a minor role in Fallen and in Passion. In Rapture, she accompanies Luce and Daniel Grigori along with the other Angels, helping them find the Relics to end their curse.