Carissa is the second daughter of Queen Regnant Elizard, embodying "military might" among her sisters. She possesses blonde hair tied back, blue eyes, and wears a distinctive red leather dress resembling bondage attire, featuring a wire-supported skirt that expands or contracts like an umbrella. Her accessories include red gloves extending nearly to her shoulders and a small golden crown, creating a gaudy aesthetic. Her personality displays arrogance, pride in her royal status, and open disdain for her younger sister Villian, whom she insults for representing "virtue" and perceived weakness. Militaristic by nature, she aggressively pursues solutions, particularly against nations like France due to historical animosities. Despite her tyrannical actions during her coup, intense patriotism motivates her; she aims to protect Britain's honor amid perceived decline caused by treaties with Academy City and France and growing Roman Catholic Church influence in Europe. She consciously plans to become a historical scapegoat, orchestrating her downfall to permanently seal the dangerous Curtana swords and prevent future royal abuse. Occasionally, a quirky side emerges, like enthusiastically posing for group photos. Witnessing Britain's weakening global position led her to orchestrate a rebellion. She hired New Light to locate the legendary Curtana Original and allied with the Knight Leader and Knights of England. Using the Eurotunnel bombing as justification—and manipulating Index Librorum Prohibitorum's magical analysis to blame France—she initiated the British Halloween coup, overthrowing Queen Elizard. Assuming rulership, she aimed to invade France and challenge the Vatican. Her forces faced opposition from Princess Villian, Necessarius, and allies like Kamijou Touma. Carissa wields the Curtana Original, a spiritual item channeling Archangel Michael's power, granting near-invincibility on British soil, enhanced strength, speed, and endurance. The sword controls geographical spells tied to Britain's four cultures and empowers the Knights as an "army of angels." Its signature ability, the All Dimensions Severing Spell, slices through all dimensions—higher and lower—creating visible dimensional debris. She also demonstrates the Omnidirectional Explosion by releasing telesma energy into the ground. After losing Curtana Original during the Battle of Buckingham Palace, she fights using shards of Curtana Second, projecting swords of light that retain dimensional-cutting properties (without debris) and can extend over 1500 meters. Initially carrying 13 shards, she dual-wields them against opponents like Kanzaki Kaori or the Maiden of Versailles. She also employs illusion magic to conceal weapons and possesses magical precognition for sensing combat flow. During the coup, Carissa displayed tactical acumen by exploiting political instability and leveraging Index's analysis, temporarily stabilizing her rule by threatening France with retaliation. However, Touma, Index, and Villian infiltrated Buckingham Palace's underground facility, enabling Anglican magicians to overload Curtana Original and disperse its power. Though defeated at Buckingham Palace, Carissa and her allies avoided incarceration; they were later deployed to battlefields or assigned missions for Britain during global conflicts, reflecting a pragmatic use of their capabilities despite their crimes.