When he first shows up, he tries to stop Harry from returning to Hogwarts, but it soon becomes clear that Dobby has a reason for his mischief and ends up as a strong ally to Harry and his friends.

"Dobby Has No Master. Dobby Is A Free Elf, And Dobby Has Come To Save Harry Potter And His Friends! It also marks how much Dobby has grown because, while he used to consistently hate and punish ...