On Your Side

Sheffield Institute began hosting exchange students and Irma was paired with Erin Peyton. However, Erin was a spy sent by Tecla Ibsen to control Irma's mind, separate her from the other Guardians, and help Tecla defeat her enemies. W.I.T.C.H. realized that Erin had been tricked into thinking they were the villains who attacked her home and only after helping her find her lost brother did they bring their two new friends to their side.