Cassandra jumped at someone knocking on the door, glancing to Lorenzo as she slipped her glove back on her marked left hand, "You see, that's what you do at a door, knock" She said with amusement, rising and going over to the door. She opened it, still smiling, to see Ren there. "Well,you look horrible" She said brightly, "But I was reading up on temptaint before coming here, and that's only right, given that the demon just doesn't wound your flesh, but your spirit too" 

She leaned against the door frame, wondering why Ren had knocked on the door, "Did you want anything?" Cassandra asked, "We were just going to start on that homework Professor Oliva gave us, if you wanted to join" She imagined that Ren was more learning by doing, then learning by book work, so offering a little help wasn't a bad thing. "You just need to find another chair"