Suddenly Jon hears a thud besides him. He looks down to see that he somehow dropped the stone, "how the? I was holding onto it tightly" he thinks to himself. He bends down and tries to grab the stone, only for his hand to pass right through it!
"What the hell?!" He tries to yell, but no sound is produced. Horrified and panicked he looks around his room only to realize that it's quickly changing, taking on a very familiar esthetic. Sure enough within a couple seconds jon's sister Zoe appears out of nowhere.
Imediately Jon starts to clue into what happened, one of the things the stone changed was clearly making "Jon" be no more. And with him gone his room became Zoe's room. To make things worse he can't fix himself with the stone because he cannot touch the stone. "But how was this supposed to help me fit in?" He wonders "did the stone just expect me to follow around the girls as a disembodied spirit?"