The girl sat down beside Alex and smiled at the two. "I'm Blair, Blaid Nyx, hopefully 4th generation Slytherin. What about you two?" Her voice was bright and cheerful, her entire being practically radiating friendliness. 

Arthur shrugged a little. "He's only a kid, give him a change. I mean, you never know right? Some time away from your folks might give him the freedom he needs to grow up a bit."