Carissa

Carissa (キャーリサ Kyārisa?) is a character introduced in Toaru Majutsu no Index. She is a member of the British Royal Family and the second of three daughters of Queen Regnant Elizard. Of the three princesses, she possesses the aspect of "military might."

During the gradual descent of the United Kingdom's favor among the European nations, she launches a coup d'état along with the Knights of England using the power of the Curtana Original in an attempt to shift the balance of power away from the Roman Catholic Church, whose influence covers much of Europe. The coup faced opposition from her younger sister Villian, her allies, and Necessarius and although she usurped power, she failed to completely stop the resistance, resulting in the British Halloween. Carissa is later defeated at the Battle of Buckingham Palace.

Despite her and her allies' crimes, they are sent to the battlefield as the world falls into war, and later, does missions for the country instead of being incarcerated.

LOTM: Crossover - The Corbin Files
In LOTM: Witnesses of Sleepy Hollow & Sword of Kings Crossover - The Corbin Files, Carissa serves as the primary antagonist of its English Civil War Sub Arc and one of the secondary antagonists in overall story, being a power hungry princess brainwashed by the combined force of Aleister Crowley, Michael Langdon and Terra of the Left, and the brainwash dart and unleshed her thrist for power hidden beneath the heart. She pretened to join the KnightWalker Family while She later met The Fallen who persuaded her to become a puppet of KnightWalkers and was saved by him after her capture. Then, under The Fallen's order, Lusamine took Carissa to Vatican, and she later joined Fallen Roman Catholic Church's church milliant when Michael gained power as the new pope.