Phinea Nigella was suspicious of all students, of all people within her castle's walls. Usually she was not at such a great disadvantage. Though the students were many, Phinea took care to learn about each one of them, to know them well enough as she deemed necessary. This individual she did not even had a name for, and that made her trust her even less. Her eyes scoured the wall the wand had been raised against. Her hand ran along the stone, to find it had been, if slightly, altered.
The girl wasn't from England. That was immediately apparent. Thus, the likelihood of her having been a Hogwarts student, proper, at any time was greatly decreased. The girl didn't belong in this castle. She had little right to be here and no right to abuse it. "I doubt that," Phinea's fingers rubbed together, getting rid of the small bits that stuck to any stone wall. Her eyes looked at the girl, suspiciously. Phinea wished to know more, of course, but she knew enough to make a judgment. "You were attacking it, abusing it, damaging it," Phinea added, "as you have no right to." She left the question unanswered for the moment. No question was just a question in her mind.