It's logical that they'd have other things in common (channel surfing, smirking :); they're siblings.

Maybe, maybe not. I have very little in common with my siblings, and channel surfing is surely learned behavior, and probably smirking, too. (I'm not sure why but I have developed an intense dislike for "smirking." It's so over-used and misused in fic. I want to erase it from every story, including my own.) The problem is she doesn't seem like a real person to me, and I'm not sure she's even meant to.