Raine is really bad at showing off. I mean, sure, she can explode her sleeves with a light flex and has been growing so fast lately she doesn't have any more pants, but she's just too -shy- for proper smugness!
You ask her to show off and strike a pose, and she just looks stressed, her face does -not- naturally do 'smug'.
Okay, maybe she's only bad at intentionally showing off.