Jeanne d'Arc the 30th

Jeanne d'Arc the 30th (aka Durandal / Diamond Dust Witch) is an ice attribute ability user from the organization IU. During the course of Volume 2 of the light novel , she targets Shirayuki in an attempt to kidnap her and force her to join IU but is captured with the combined efforts of Aria, Kinji and Shirayuki during Adseard. As one of the conditions of her Plea Bargain with the Masters, she is forced to stay in Butei High as a 2nd year exchange student from Paris, enrolled in Informa. Both Riko and Jeanne get along with each other, and taught each other skills. She taught Riko strategy-making techniques, while learning how to mimic people's voices from Riko.