Question: Which character in Harry Potter and the Prisoner of Azkaban helped Harry rescue Hermione Granger from a troll?
Related documents: [0]  [DOC] Harry Potter and the Prisoner of Azkaban is the third novel in the "Harry Potter" series, written by J. K. Rowling. The book follows Harry Potter, a young wizard, in his third year at Hogwarts School of Witchcraft and Wizardry. Along with friends Ronald Weasley and Hermione Granger, Harry investigates Sirius Black, an escaped prisoner from Azkaban who they believe is one of Lord Voldemort's old allies. [END] 
[1]  [DOC] Hermione Jean Granger ( ) is a fictional character in J. K. Rowling's "Harry Potter" series. She first appears in "Harry Potter and the Philosopher's Stone", as a new student on her way to Hogwarts. After Harry and Ron save her from a mountain troll in the girls' toilets, she becomes best friends with them and often uses her quick wit, deft recall, and encyclopaedic knowledge to help them. Rowling has stated that Hermione resembles herself at a younger age, with her insecurity and fear of failure. [END] 
Answer: 
Ronald Weasley
Ronald Weasley