It took a few minutes to get to Meruin's room. Once at the door, the girl placed her hand at the center. A glowing circle appeared and was joined by dozens of others, stretching past the door itself and making a spiral like pattern. "Sorry for this, but I'm just sealing a part of my room. I trust you, but a mages workshop is were we keep our greatest secrets. To show another person that part of their workshop is more intimate than sexual intercourse," she explained, keeping her eye on the door. 

After a moment, she grabbed the handle and opened it. "Okay, you can come in now."