Which character is known for their ability to transform into a dog and for their close friendship with James Potter?
Sirius Black.
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> Which character is known for their ability to transform into a dog and for their close friendship with James Potter? [/INST] Sirius Black. </s>