Who does Hermione impersonate using the Polyjuice Potion in the second book of the Harry Potter series?
Millicent Bulstrode
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> Who does Hermione impersonate using the Polyjuice Potion in the second book of the Harry Potter series? [/INST] Millicent Bulstrode </s>