A student at Oxford Academy and the famous writer in England. She is an elf and owner of the mortal sin armament Aspida Philargia. Having a history with Toussaint, she challenges him during the Musashi's incursion on England, not only forcing him to retreat but afflicting him with the spell "Curse of Macbeth" that would force him to kill Aoi just as Macbeth from Shakespeare's play of the same name killed his king. During their rematch, Toussaint not only manages to defeat Thomas and lift the curse, but also to confiscate Aspida Philargia from her.