Viola, alias Violet, is formerly an assassin and officer from the Trebol's Army division of the Donquixote Pirates, the younger sister of the late Scarlett, Rebecca's aunt, and King Riku Dold III's daughter, thus making Viola the second crown princess of Dressrosa becoming the heiress to the throne after Scarlett faked her death before her family's dethronement.Viola is a young, slender, curvaceous, lightly-tanned, well-endowed woman, of slightly below average height (a head shorter than Sanji when standing upright wearing high heels), with long black hair that reaches down to her mid-back, with a lock hanging on her left side.
She wears a red rose in her hair, a long, sleeveless white Flamenco dress with violet polka dot and frills, round earrings, and purple stiletto heels.
Ten years before her debut, before joining the Donquixote Pirates, Viola's hair was much shorter. She wore a hairband and a long dress with a black top with a light and frilly bottom.
Like most of the dancing women of Dressrosa, Viola appears to be emotional and romantic, and as many in Acacia she will stab a man in the back if he betrays her. She is very manipulative, using her charm to persuade Sanji to kill a man for her and luring him into a trap. She is also capable of direct violence as shown when she kicks Sanji in the face leaving him barely conscious and bleeding.
In truth, her ruthless behavior is a symptom of a profound cynicism; not a single man she has ever been involved with has been honest with her, something that her powers allow her awareness of. Deep down, she has a kind heart that was moved by Sanji's honesty and kindness, leading her to try to help him, in spite of the consequences.
She is more noble than she seems, as she sacrificed her own freedom in order to spare her father's life. Indeed, prior to her family's dethronement, Viola showed a much more amiable and trusting personality, trying to persuade her sister to trust Kyros despite his background.
Viola is a very graceful Flamenco dancer. She is very good at seducing men into doing what she wants and, as an assassin in the Trebol Army with high regards from the other members, is an accomplished fighter, being able to severely wound Sanji, although comparing their respective strengths is difficult, due to the well-known fact that Sanji would never injure a woman, even if it cost him his life.
As the former princess of Dressrosa, she had great authority over the country, a status that was taken away when her family was dethroned by Doflamingo. As a former officer of the Donquixote Pirates, she had command over the 2000 soldiers, though she defected and lost such statuses as well.
Viola ate the Giro Giro no Mi, a Paramecia-class Devil Fruit that allows her to form "goggles" via her fingers, which she can use to see through everything (akin to X-ray vision) and read the minds of others, as well as allow others to see into her memories in return. It was due to this that she managed to see through all the men who attempted to lie to her, making it impossible to deceive her altogether.
She can also form tears from inside of her eyes and manipulate them into large whales to attack her targets.
It was this very ability that made Viola a very valuable asset to the Donquixote Pirates, as Doflamingo accepted her offer to spare King Riku's life in exchange for her services. She had already eaten the Devil Fruit by the age of ten.