If there's someone in the tower, she's going to find out. Whatever it takes, it doesn't matter. Not really, not exactly. She has a real weapon on her, but she also doesn't plan on using it because the only person who could possibly be here is from the Tower.

This isn't some trick of Ruana's.

Still, the old soldier isn't the sort to opt for a sneak attack in a place she isn't familiar with. It's better to announce oneself given the current situation. "Is there anyone here?"