By the time the first Hogsmade weekend approached, Mia would have narrowed down the traitor inside Hogwarts to a few people. Ultimately, she would decide it was Professor Hassat and she would be right. He was working with someone outside of Hogwarts, someone that Mia would witness Tom Riddle speaking to in Hogsmeade. She would ask Nina, but Nina wouldn't know – she'd never been able to determine who the cloaked figure was, only that the person had been around Tom since before Dumbledore told him he was a wizard.