In Book 7, what three Ministry of Magic employees do Ron, Harry, and Hermione impersonate?
Mafalda Hopkirk, Reginald Cattermole, and Albert Runcorn.
<s>[INST] In Book 7, what three Ministry of Magic employees do Ron, Harry, and Hermione impersonate? [/INST] Mafalda Hopkirk, Reginald Cattermole, and Albert Runcorn. </s>