They had a serious side when their frends needed help...But even then they made jokes about that...Just remember when Harry was the "hair of Slytherin"...Too funny...

I never got why did she killed Fred I understand that one of the Weasleys kids had to daid, there was 7 of them, but why Fred...Ok she couldent kill Bill he just got marryed...But there was Charlie and Percy...Why did she had to kill any of the good guys...