As a giant, Diane is several times larger than an ordinary human being (she is 30 feet tall). She is fair, 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 childlike. Her symbol, which is of the Serpent, is located on the upper, outer thigh. She is in love with King, but hasn’t told him. She is the sin of envy.