Cai wandered up to the Staff Table. She looked at one of the teachers, who she thought was the Arithmancy teacher, what ever Arithmancy was. "Uh, hi. I'm Cai, Cai Black." Oh boy, now she really sounded stupid. "You're the Arithmancy teacher, right? Uh, I was wondering if you could help me. I don't know who my head of house is. I'm in Gryffindor." She smiled. "Great, that sounded really stupid. She's probably going to think that I'm a Muggle-born, not that there's anything wrong with them. And the part about what house I'm in? That was down right stupid. I have a badge on my robes that would tell her that I'm in Gryffindor. That was really stupid." Cai decided to take another walk. Maybe she should get out of here. "No," she thought. "I need to know the answer to my question. I have to stay." Cai smiled at the teacher again as she waited for her answer.