an obi sash. Her main weapon is a Tessen fan, being given an additional one since the second season, and her one-and-only power is telekinesis, allowing her to move objects and levitate her three best friends with her mind alone; it is rarely used as it tires her out pretty quickly. During the fourth season, we see more of this ability being used by Yumi, this time with more ease and control. William Dunbar Voiced by: Mathieu Moreau (French); David Gasman (English) An overconfident student who starts attending Kadic Academy after he was expelled from his previous school for vandalism. Yumi befriends him and he soon develops feelings for her. He often fights with Ulrich for Yumi's attention and is sometimes disrespectful of Yumi's boundaries, causing her to become frustrated with his unwanted advances. After proving helpful to the group during several X.A.N.A. attacks, they vote on whether he should be allowed to join the group, but Yumi votes no and his memory is erased. Eventually, however, the vote becomes unanimous when William's membership is deemed necessary. On his first mission on Lyoko, William is captured and possessed by X.A.N.A., who ensnares William as its puppet. From that point on, a clone of William, created by Jeremy, is used to pose as the real William until Jeremy is able to free him. Unfortunately, Jeremy's program is imperfect, causing the William clone to act either unintelligent or unpredictable. Near the end of the series, the clone starts developing several human-like traits, which he eventually uses to help the warriors. Towards the end of the series, William is finally released from X.A.N.A.'s control. On Lyoko, William wears a white outfit and carries a giant sword, which can release shock waves. Under X.A.N.A.'s control, his outfit turns black and he gains a spiked gauntlet on his wrist, which can be used for defense. He has an array of powers including enhanced strength; "Supersmoke," which allows him to transform into a cloud of black smoke and move around at great speed, eventually gaining the ability to fly as well; a second sight allowing him to see across great distances; and levitation. X.A.N.A. sends William to stop the Lyoko Warriors on the virtual world, and thanks to his natural abilities strengthened even further by the artificial intelligence, he proved to be a formidable opponent. He is finally released in "Down to Earth." Villains X.A.N.A. Sometimes