She is a supporting character in the special story of Toaru Majutsu no Index released on Dengeki Bunko and in Toaru Majutsu no Index: Kanzaki SS.

She is a 12-year-old girl with short blond hair, green eyes and a petite figure who wears a pink orange-like dress; she also is the younger sister of Patricia Birdway. She is a talented magician who has received various proposals from many organizations to join but flatly rejected them all. She encounters Touma in a random discovery of a certain organization's meeting and which involves him in a misunderstanding which makes her group to think of him to be a spy from a rival organization. She is later revealed to be the leader of the said organization, called the Dawn-colored Sunlight, despite her age.

She reappears at the very end of volume one of the New Testament novels. For certain reasons she gives Touma, Shiage and Accelerator a lecture on magic, magic cabals, and the new enemy that the Magic and Science sides will be facing:

While she is not an enemy, she does know a surprising amount of what's been going on, and informs the three boys about the real reason World War III happened.