ohlumos:

hpmeme: Four Professors  [2/4]

‘Possibly no one’s warned you, Lupin, but this
class contains Neville Longbottom. I would advise you not to entrust him
with anything difficult. Not unless Miss Granger is hissing
instructions in his ear.’ Professor Lupin had raised his eyebrows. ‘I
was hoping that Neville would assist me with the first stage of the
operation,’ he said, ‘and I am sure he will perform it admirably.’