What is Barty Crouch Jr.'s role in the series?
He is one of Voldemort's followers, disguised as Mad-Eye Moody.
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> What is Barty Crouch Jr.'s role in the series? [/INST] He is one of Voldemort's followers, disguised as Mad-Eye Moody. </s>