Professor Flitwick was one who I respected the most out of the Hogwarts staff. Professor Snape was up there, but considering he was a Death Eater, I couldn’t tell him this truth in case Voldemort decided to pry the information out of his head. A part of me doesn’t want to reveal this to him. To only have the select few who know. The less who knew, the better. But Professor Flitwick was a master duelist and his shields were good enough that he would be able to react if someone tried to force their way into his mind. It did help that he had Goblin ancestry which enforced the privacy of this secret.