Duvalie, also known as Duvalie the Swift, A member of the Stahlritter serving directly under Arianrhod. While fiercely loyal, she is having doubts about her lord's goals.

Under the guidance of the Steel Maiden, Arianrhod, Duvalie has become a strong swordsman whose speed and swiftness have become on par with Leonhardt the Bladelord after the latter's demise. With her built-up speed, Duvalie's swordsmanship makes her unmatched probably against a squad, thus earning her alias, Duvalie the Swift (神速のデュバリィ) and made head knight of the Stahlritter.

Unlike all knights who are bound to the code of chivalry, Duvalie is described as a "tsundere" who hot-tempered, ever-willing, devoted, short-tempered and bragging. But her character portrays her suit for battle than living the life of a delicate woman, boasting that she’s a swordsman who cannot be bested. However deep down, she is sincere who refuses anything that strays from the righteousness.

Her loyalty Arianrhod is fierce to the range from devotion to adoration wher she becomes a complete fanatic. The admiration of her leader leads her to brag about her invincibility, and will not let anyone say otherwise. But can become overly emotional rather quickly, which can result in her slipping up and making costly mistakes.

(Source: Nihon Falcom Wiki)