The one that blushed was Jon. Everyone saw him as a boy, he thought of himself as one, but he was really a girl....
Later that night, Jon was sitting by himself (well, herself, but he thought of himself as "himself"). He wasn't aware of any more recent changes and, as in other threads, was bored. "Hmmm, I wish something interesting would happen," he said while holding the stone. "Uh oh, what happened?" Jon asked.