Villian

Villian (ヴィリアン) is the 3rd princess and Queen Elizard's youngest daughter (currently aged 24). She's caught up in her sister's rebellion against her mother and was planned to be executed. She's later saved by Acqua of the Back, aka William Orwell, whom she has taken a liking to ever since he saved her ten years ago. After being freed, she allies up with the Necessarius and those that are against Carissa's rebellion. .

Of the three princesses, she possesses the trait "Benevolence".

Personality
Villian's personality is a passive one, Elizard pointed out that Villian takes others into such high consideration that she barely has opinions of her own; and that her personality could lead her almost to the point that she needs to depend on others to survive. Despite that Villian can show resolve if necessary, and due to her trait of "virtue" she can gather around her valuable people that can aid her in her endeavours.

Princess Villian has stated that she had refused to undergo magical training as she doesn't like the idea of gaining abilities that could be used as weapons ; thanks to that the refinement of her magic power is capped as zero, similarly to Index's case.

British Royal Family Arc
After the airplane accident involving Touma and Index, Villian receives assurance over her antique telephone that the passengers arrived safely to their destination. She urges the receiver of the call (an airways employee) to hasten the delivery of liquid foods to each individual household in need. Villian then laments her lack of ability and influence compared to her sisters due to her emphasis on benevolence rather than wisdom, the domain of the first princess Riméa or military expertise, the domain of the second princess Carissa. Her only role in maintaining England is as a tool in negotiating with other nations through potential political marriage, though her family only presents this option to ousiders as a lure and not as a serious offer. She is attended by a civilian maid, as opposed to the royal maids who attend to the rest of the royalty. She is told that representatives of the Knights of England and the Anglican church have arrived, and leaves her room to meet them.

She appears in the queen's presence following her two sisters, making a very quaint approach. Despite her shy behavior, she joins her two sisters later in a photo with Touma. After the strategy meeting, she joins her sister Carissa and Index. While Carissa receives Curtana Original and reveals her true intentions towards England, Villian escapes the carriage with the help of some nearby servants through her good will.

Design evolution
Villian's design remains static throughout the series. According to Haimura, she was designed similarly to Tina (Terra in the English releases) of Final Fantasy VI fame, but most specifically, her appearance in Dissidia Final Fantasy.

Trivia

 * Kanzaki Kaori and Tatemiya Saiji warned Kamijou Touma that if he gets involved in any embarrassing accident with the princess (such as, flipping her skirt), that would be considered lèse majesté ; certainly enough, Index was quick to point when Kamijou's misfortune caused Villian to end up in an unsightly accident.

Quotes

 * (Volume 18) : “…Even if I am a princess, I’m not that sheltered” -- Stated as she was driving a car.