We first meet Percy at Platform 9 & 3/4 when we also learn that he is a prefect. The first thing that you notice about him is that he is very pompus and likes to always be right. By the 3rd book Percy is Head Boy and very proud of it. When he leaves school in the 4th book to work for Mr Crouch his acedemic skill shines through and he is promoted to Pesonal Assistant. Throughout his life he has been the spawn of many jokes by younger twin brothers Fred and George who always manage to wind him up.

Bill

Bill is one of the oldest Weasley brothers so he doesn't attend Hogwarts anymore. We only meet him in the 4th book but we hear about him throughout the series. Bill works for Gringotts Bank as a code breaker. He has long hair and an earring much to his mother's dismay.

Charlie

Charlie is first introduced to us when he helps smuggle Norbert the Norweigan Ridgeback out of the country. He works with dragons and was a favourite of the Hogwarts grounds keeper Hagrid when he attended the school.

Molly & Arthur

Molly is the Weasley family's mum. She is always there for the family and Harry but she can take things very seriously and is always having to shout at Fred and George for messing about. She also worries a lot but only because she loves her children very much.
Arthur Weasley works for the Ministry of Magic in the Misuse of Muggle Artifacts department. He is not as stern as Mrs Weasley but he knows when somebodys gone too far. If there's anybody he doesn't like it's Lucius Malfoy whom he once had a fight with.