Alucard had seen what the Brotherhood of Light was doing, and had been following them as they chased a girl that seemed to be a scientist through the streets, and straight into...his father's castle. He sighed, and entered the castle, watching the girl. He had the Masamune in its sheathe at his hip while he watched her, to make sure she didn't do anything drastic, but as soon as he saw one of the monsters that dwelled in the castle about to attack her from behind, he quickly dropped down behind the girl, killing the creature with one slice of his blade, simply cutting its head in half as he landed.