When the hair plucked from the robes of Slytherin student Millicent Bulstrode turns out to be that of her cat, Hermione finds herself transformed into a human cat. It takes several weeks for the effects to completely wear off.
12) Which of Shakespeare's plays is Hermione's name taken from?
Hermione stops fraudulent tabloid reporter and unregistered Animagus Rita Skeeter, who had published defamatory material about Hermione, Harry, and Hagrid during the Triwizard Tournament, by holding her Animagus form (a beetle) captive in a jar.
16) Who does Hermione impersonate in order to steal one of Voldemort's horcruxes?
Rowling has stated on multiple occasions that the character of Hermione is somewhat autobiographical: "I did not set out to make Hermione like me but she is ... she is an exaggeration of how I was when I was younger."
20) What Death Eater injures Hermione in the battle in the Department of Mysteries?