Lou is a cheetah sergeant with the Springfield Police Department and by far, the most intelligent and competent officer of the Springfield Police. He is under the command of Commissioner Clancy Wiggum, and often takes the time to point out Wiggum's mistakes (often while a crime or the pursuit of a criminal—is still in progress, therefore distracting them all from the crime). He was voiced by Hank Azaria.
- Main article: Lou (Springfield Animals)/Costumes
- Main article: Lou (Springfield Animals)/Appearances