Tiffany watched as Sarah, Lucy, and Erica went though Jon's things one-by-one. A black duffel bag was changed to pink. A T-shirt into a tank top. A can of Axe deodorant into a Bath and Body Works lilac body spray.
The moment that Sarah had told Jon to be a good cheerleader, his whole demeanor had changed. He was as enthusiastic about these changes as the girls who were making them. Normally Tiffany wouldn't care so much about this sort of thing, but with Melissa gone, she was now Sarah's strongest ally, and she needed to act like it. Needed to look out for Sarah.
Because it was very clear that the head cheerleader was shell-shocked from the afternoon's events. Frazzled. Acting more impulsively than she should. Using more magic, draining more of her energy than she should. There was no reason Lucy and Erica couldn't have this locker task delegated to them, but Sarah insisted on doing most of it herself.
She sat down and squinted her eyes. This was the sort of thing Melissa always did, gathering information and reporting to Sarah. There was still magic swirling around Jon, camouflaged but detectable if you were looking for it. A skilled magic user had woven this, at least as skilled as Tiffany, herself.
Sarah produced the final item from Jon's new locker: a reddish stone that quickly became a pink stone with a white daisy painted on it. Sarah hadn't even noticed how her magic had interacted oddly with the stone, having lost herself in the simple joy of a locker makeover. But Tiffany saw.
So as Sarah dismissed Lucy and Erica, and as she announced that she would be going home with her newest cheerleader to continue "correcting" the items that Jon owned, Tiffany made an excuse to stay behind. And once she was alone in the locker room, she snapped her fingers and Jon's new locker opened up. And a moment later the pink stone with the daisy on it was in Tiffany's hand. And with the ability to examine it this closely, she came to her ultimate conclusion.
"Kyla."
She slammed the locker door shut and marched towards the exit, casting a quick locator spell while she moved. If Kyla's magic was still affecting Jon, then it was still draining her energy. A quick confrontation now, while Kyla was weak, might just solve everything.