Nodding once, Blaise followed her instruction without question. It had never been in his interest to be anything but respectful to any of the teachers. This had been the case even when the school had employed people he could barely tolerate, let alone respect.
Professor Sinistra had a different air about her than the rest of the staff. If Blaise was honest with himself, he would describe her as almost frightening. Her character did not demand fear such as Professor Snape had, but she was a person around which one would be on his guard.