HAGRID
Hagrid the half-giant, is Keeper of Keys and Grounds at Hogwarts. He is a former pupil who left due to 'personal reasons', but who has returned to maintain the school grounds out of loyalty to Dumbledore. He has a passion and gentle affection for dragons, beasts and the sort of magical creatures others might find terrifying! Despite his rough edges and lumbering appearance, Hagrid is both unquestionably loyal and honest and is incredibly protective of Harry.
For more on Robbie Coltrane, the actor who plays Hagrid, click here.