Catherine is portrayed as a woman of short stature with an average build and a fair complexion. She has upper-back-length dark blonde hair, mildly curly at the tips, and chocolate brown eyes that often gaze sideways. Catherine was described as the "most beautiful person in the world" by Heathcliff, and her presence captivates the Edgar Family at first sight.

She is the lover of Heathcliff, and the "loving wife" of Linton Edgar, of whom which she uses the saber of. 