I dont understand why he didnt defend himself more, but maybe he hit nox as a malfoy, then switched? nox could have said that he was any vanilla and no one would know, but... I dont know. thats the scenario i see, unless aaryan hit a goodie. odds that he hit a goodie are high, and then he had to guess, but if he hit a baddie, my guess is malfoy, and thought he coudl do more by switching. Just my thoughts.