Aya blinked as she heard the knocking. That was funny, she wasn't really expecting anyone... although, now that she thought about it, there was at least one person who had a tendency to drop by unannounced...
Shrugging to herself, she got up off her bed, tucking a bookmark between the pages of the book she had lifted from the library to pass the time, and headed towards the door.
She cracked the door open a tiny bit, body slightly pressed against it in case she had to fling it closed again, and blinked again, spying her brother. Not surprised per se, but still concerned, because she couldn't think of something that had happened lately that would send him to check up on her. Not counting the explosion, of course.
Unless, of course, something was going to happen again; she still found herself wondering how he had known about that.