Hermione Granger ( hur-MY-ə-nee GRAYN-jər) is a fictional character in the Harry Potter series of novels by J. K. Rowling. She first appeared in Harry Potter and the Philosopher's Stone (1997), as a first-year student on her way to Hogwarts. She becomes friends with Harry Potter and Ron Weasley after they save her from a troll in the girls' bathroom. Hermione often uses her quick wit, deft recall, and encyclopaedic knowledge to help her friends in perilous situations. Rowling has stated that Hermione resembles herself as a young girl, with her insecurity and fear of failure.
Hermione has been immensely popular. The version of the character portrayed by Emma Watson in all eight Harry Potter films was voted the best female character of all time in a 2016 poll of Hollywood professionals conducted by The Hollywood Reporter.