he grew up knowing about magic, but his mum wanted him to know about his muggle half too, so he actually went to muggle school up until he got his letter. he goes back and forth between being shy and being outgoing, depending on the situation and the people involved. if he feels comfortable, he has no problem letting loose a bit. he's fairly easygoing, letting most things roll off his back but he personifies the loyalty trait of his house and would do just about anything for the people he cares about. he's a sixth year, so i think he's a year younger than her, but maybe a professor asked her to tutor him in something back in second/third year and they became friends through that?