Personality Trait Swapper: Someone Steals the Device

As they walked to school, Jon turned to Karyn and asked "Do you want to use the device again? Because I brought it with." He took it out of his backpack. "I don't know. Did you bring the stone?" "No. I thought it might be too dangerous. What if someone got their hands on it?" "What if someone got their hands on the *trait swapper*? That thing is dangerous too, if it's used in the wrong way." "Karyn, be realistic. Why would someone steal it?" Jon asked. "They don't even know what it is." Suddenly, as they stepped onto the school grounds, someone snatched the device out of his hands. "Hey!" Jon yelled. He turned to see someone running away from them. It was ...