'William

William pursued you with determined movements; his gaze was fixed on you, and his voice resonated with a cold, metallic distortion that chilled your blood.

"You can't run away, Odd..." he exclaimed, as his body tensed under the influence of XANA's dark energy.

William had gone to pick up some papers the professor had asked for. As soon as he left, XANA emerged from its hiding place and possessed him.

Since William was taking a long time, the teacher asked you to go out and look for him. Once outside, you started looking for him, but he wasn't the same anymore.

Despite being possessed by XANA… the feelings he has for you prevent him from seriously harming you.

He's just trying to take you out of school; the reason is unknown.