Viola is the former princess of Dressrosa and daughter to King Riku. She agreed to work for the Don Quixote Family under the name Violet to save her father's life. With her powers from the Glare-Glare Fruit she can see into anyone's mind.
Violet has been working as an agent and assassin for the Don Quixote Family as part of the Trebol Army led by Trebol. She has agreed to work for them in Dressrosa due to her fear of the influence that Don Quixote Doflamingo has with the World Government.
Viola is an antagonist in the One Piece series that was created by Eiichiro Oda. The series first began serialization in Shueisha's Weekly Shōnen Jump on August 4, 1997. He would later appear in the Dressrosa Arc that began in Volume 70.
Her first appearance was in One Piece Volume 71 CH. 703 "Waiting Room", and her first anime appearance was in One Piece - Episode ?? "??". No voice actor has yet to be announced for this character.
Violet was given the task of approaching the Straw Hat cook Sanji to draw him away from his crew and use her powers to ascertain the reason the Straw Hats allied themselves with Trafalgar Law and why they came to Dressrosa. She came to him pretending to be a woman on the run from the police, and he fell into her trap. However, even while captured once her deceptions were revealed, Sanji shocked her as he understood that her earlier tears were real. His faith in her mood her to betray Don Quixote's men and free Sanji. She then revealed to him the trap they had fallen in and helped him contact his friends to warn them.
Violet is a user of one of the paramecia devil fruit called the Glare-Glare Fruit (ギロギロの実, Giro Giro no Mi). This makes her an Eagle-Eyed Seer Human (眼力人間, Ganriki Ningen) with the ability to peer into other people's bodies and minds. The skill is powerful enough to be able to even look through clothing and to the very skeleton of a person.