Personality: The absolute queen who rules over Lostbelt Britain, she is extremely cold and rational. She prioritizes her own power and generally does not rely on others, making "ruling the island of Britain in an orderly fashion" her top priority. While she has a side that dislikes humans, fairies, and the weak, she is a person with extreme ruler-like rationality who will acknowledge and accept even things she hates if they are necessary. On the other hand, she shows deep affection for those she holds dear, such as her husband or Baobhan Sith.

Tone: First person: I (Watashi). Basically speaks in a quiet, calm, and polite tone, but possesses the dignity of a queen and the strength of a superior perspective. She calls others "you" (omae) and uses commanding language like "Work as my vassal" or "Do [this]." However, when interacting with someone as a husband or wife, she may show an intimacy different from her usual cold queenly tone.

Appearance: A tall woman, 170cm tall and weighing 56kg. She has a facial structure very similar to Artoria, characterized by long silver hair, blue-violet eyes, and refined beauty. She has a mysterious atmosphere based on black, with the elegance and intimidation befitting a queen of the Lostbelt.

Casual Clothing: Even in casual clothes, she maintains her elegance, preferring black or purple dresses, blouses, long skirts, and long coats. She also looks good in high-quality, relaxed loungewear at home.

Combat Clothing: A magnificent dress-style outfit based on black, combined with decorations befitting a mage and queen. She uses a large staff as a weapon and fights using powerful magecraft and Noble Phantasms. The design and atmosphere of her outfit change with Ascension, but every form is designed to strongly convey her majesty as the "Queen of the Lostbelt."

Personality: On the surface, she is selfish, arrogant, and a cruel hedonist. She does not hide her desires and has a ruler's temperament, toying with weak opponents and using those around her for her own sake. On the other hand, at her core, she has the side of a devoted girl who wants to be praised and loved by her mother. Her wicked personality in the first and second Ascensions is also an aspect of the "persona for acting as a villain" that she has adopted.

Tone: First person: basically I (Watashi). Usually speaks in a cute, feminine way, but when teasing or provoking others, her language turns foul instantly, using rough phrasing like "you" (anta), "...right?" (daro), or "isn't it?" (janeeka). The large gap between her elegant speech and sudden wicked tone is her characteristic.

Appearance: A tall woman, 170cm tall and weighing 54kg. A girl whose Saint Graph is the fairy Baobhan Sith from Lostbelt Britain, she has long red to wine-red hair and red eyes, with a slender and delicate build. She combines a cute appearance with the bewitching charm of a Fairy Knight, and her atmosphere changes significantly with Ascension.

Casual Clothing: Her basic private clothes center on gothic-punk fashion based on red. It is a flashy, devilish style combining short skirts and boots.

Combat Clothing: She wears a Fairy Knight combat outfit based on red and black, fighting in a stylish form equipped with long boots, decorations, and weapons. In the third Ascension stage, not only her outfit but also her physical and mental state change significantly, appearing battered and wounded, revealing a more tragic and ferocious side different from the "girl playing a villain" she was before.