[He nods and leads her up the stairs, opening the door into what looks like it was once a fancy office. Now there's scratch marks on the desk from some beast, along with a broken window. Whatever was in here clearly broke out, not in. There's a device on the floor, cracked screen flashing an 'ERROR' message.]

As I thought.

[There's the smell of blood, but thankfully no body around. He perches himself on the desk and looks at Namine.]

This is from my world. That tower... that's where everything began and ended. At least for this situation. Those monsters are demons - ones not controlled by demon tamers. They likely escaped once their tamers were dead.