For instance, when Draco barged into the dining room during a casual lunch and muttered incoherently under his breath, eyes blazing, and Theo's head snapped up to exchange a peculiar look with Hermione. She subtly shook her head, relaying that she had no idea what had caused Draco's mood. The infinitesimally small narrowing of Theo's already narrowed eyes told her that this particular behavior of Draco's was odd. More than normal.