"Ah, so that's why...I should probably fix that..." He reached back to the door to the studio and mumbled a couple of words to release his previous command, the door and the wall responding like before. "As for the doors, I'm pretty sure that I'm limited to the ones in here. Maybe there are a few doors outside the castle that would still respond to me like that, but I wouldn't expect a lot of them. They probably wouldn't recognize me the same way." 

At Wrenna's response regarding the prisoner, nodded with a small noise of acknowledgment. "That would be pretty tricky, I suppose. Maybe not impossible, but perhaps not advisable. You'd have to do it alone, too; depending on what they did, my hands would probably be tied. I can't just let prisoners go for no reason without running into a lot of problems. If you could, though, for what reason? Is it just part of your job?"