However, rather than the ones that traumatised us the most - Fred Weasley, Dumbledore or *sobs* DOBBY! - her choice is a little more niche.
Writing for fansite Pottermore, the writer reveals that she feels guilty about the death of Florean Fortescue, the owner of the ice cream parlor in Diagon Alley.
Yeah… that guy…
It turns out she introduced the character in ‘The Prisoner of Azkaban’, with the intention of giving him a much larger role later on in the series, though she ultimately went another way.
“The problem was that when I came to write the key parts of Deathly Hallows I decided that Phineas Nigellus Black was a much more satisfactory means of conveying clues.
“I seemed to have him kidnapped and killed for no good reason. He is not the first wizard whom Voldemort murdered because he knew too much (or too little), but he is the only one I feel guilty about, because it was all my fault.”
Seriously, though, JK? No guilt whatsoever about killing off poor old Dobby?
‘Harry Potter’ fans were thrilled in October, with the news that a screenplay based on the spin-off book ‘Fantastic Beasts And Where To Find Them’ was close to completion.