One of the twin familiars of Gil Graham Aria is a catgirl and is very loyal to her master. She and her twin Lotte are always on the side of Graham and will defend him at all times. Aria specializes in ranged magical attacks. During the events of Mahou Shoujo Lyrical Nanoha A039s she and Lotte intervene on the Wolkenritter039s behalf using transformation magic using them to complete the Book of Darkness framing Nanoha and fate for it. Chrono eventually captured them with a spell that forced them to revert to their original forms learning the truth.