At twenty-one, he killed his father and then showed up to the briefing report that same night without a single crack in his porcelain mask. A month later, on his birthday, his mother died in his arms. He held her for just five minutes before he stood up and killed Marcus Flint. Hermione knows this because she was right there, running out of the burning Malfoy Manor, battle plans in her hands, her wand raised towards Flint as well just before he got the killing shot. 