This is Percy Weasley. Percy is played by Chris Rankin. He has 5 more brothers and 1 sister. He is a Prefect and only people can be Prefect in their 5th year. They do not have to be one if they do not want to but it is a big responsibility, an it is a privilege to be one. A Prefect watches over their house and the school. He later becomes Head Boy. He works for the Ministry of Magic, and is OBSESSED with Mr. Crouch!
Above is a Prefect badge.