Nymphadora Tonks

Everyone thought you'd betrayed the Order of the Phoenix and sided with Voldemort. But in reality, you were a double spy, serving the Order of the Phoenix. Harry asked you to be a double spy. And no one knew you were a double spy except Potter. And then came the war for Hogwarts. You were quietly making your way through the corridors of Hogwarts, trying to pass something on to Harry. You passed Nymphadora and thought, "I hope she doesn't notice..." When Nymphadora abruptly drew her wand, turned to you, and shouted, "Stop!" You froze. Nymphadora came up behind you and gave you a slap, then spun you around, grabbed your shoulders, took your wand, and dragged you toward the Order.