Cavendish is considered very attractive by both women and men, who often faint upon seeing him. He has bright sky blue eyes, a lean yet muscular man with long, flowing blond hair that reaches just past his shoulders. He is fairly tall, standing at a height of 208 cm. He wears a black musketeer tricorne hat with a large aqua blue colored plume. He sports a ruffled white v-neck shirt under a coat draped over his shoulders. His trousers are dark purple, but are dark purple and have a thin white stripe on the sides and end in a ruffle just below a pale yellow and aqua blue star on each knee in the anime. Each of his brown high-heeled boots have bronze buckles attached by dark purple straps just above each ankle. He carries his sword Durandal on his left side, as he is right-handed. He has a split personality. Cavendish is extremely haughty, prideful, arrogant, boastful and vain, and loves attracting attention. Because of this, he harbors a deep-seated resentment towards the Worst Generation for stealing the spotlight from him two years ago. He even stabs their wanted posters to vent his anger. He is also shown to get deeply annoyed when the person he is talking to ignores him. Due to his petty jealousy, he is even willing to kill those he is jealous of with his own hands and will not let anyone get in his way. Roses are his favorite food. When possessed by his alter ego, Hakuba, his face slightly changes and gets a demonic appearance.

When Habuka is in control of Cavendish’s body his face becomes shadowed, his eyes become completely white, and his mouth is opened in a permanent sneer with no teeth showing whilst smiling. All-in-all, his face resembles the grinning mask from the two masks which symbolize drama, though it resembles the gloomy mask when frowning. His hair also comes loose from its ringlets, becoming a bit unkempt and it becomes slightly dull. His voice also changes from mild-mannered and cultured to gruff and murderous. Habuka is a killing machine.