In the middle of the living room, she was bouncing on the couch, and he had the higher ground on the wooden antique cabinet. Little sister Twilight Sparkle trying to catapult pillows at little brother Shining Armor, the latter defending his territory of spiderwebs and lint clusters. It was an epic skirmish between two unicorns. Two siblings. Two young foals that shared a roof. Two frontlines that would give no quarter.