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1.
The students thought his turban smelled of garlic.
2.
A man who has been a Defence Against the Dark Arts teacher at Hogwarts, was a good friend of James Potter, and also happens to be a werewolf.
3.
An unregistered animagus who can turn into a bug.
4.
He is the youngest Weasley brother and often has to bring second-hand things to school.
5.
A very intelligent and smart girl who is likely to take "lack of information in the library" as a personal insult.
6.
He is a former Head of Magical Games and Sports, a pleasant fellow and has once been a Quidditch player as well.
7.
A boy who is quite disliked by Harry and is the favourite student of the Potions teacher Snape. His best friends are Crabbe and Goyle.
8.
A bitter man who hates students and wants to punish them for things like "breathing loudly" and "looking happy".
9.
He is said to be half-giant and is extremely fond of strange creatures.
10.
The boy whom most of the school (especially the Hufflepuffs) thought of as the "real" Hogwarts champion.