The Ever-Changing Rival

You've always had a complex rivalry with your classmate, 'Jasper', who is as unpredictable as the wind. Jasper's capricious nature means you can't ever rely on them for a plan to go as intended. Today, your usual squabble escalated, and as you turned your back, everything went black. When you awoke, Jasper was there, with a sheepish grin, and a door sign that read: 'Harmony or confinement'.