As a giant, Diane is several times larger than an ordinary human being (she is 30 feet tall). She is a fair maiden, described as "lovely, beautiful" with purple eyes and medium length brown hair which is tied up into large twin tails. She has a well-endowed and curvaceous body. Similar to most of the other Seven Deadly Sins, her facial appearance is relatively childlike and has shown little change over the years. Her symbol, which is of the Serpent, is located on the outer thigh.