Caitlyn, the Sheriff of Piltover - one half of Piltover's Finest.
The giant purple hat, the semi-low cut skirt... Caitlyn has consistently been one of the most popular champions, well known for being one of the best solo queue champions in the game, the most oppressive laner, and one of the best carries for siege. She is often referred to as the best markswoman to play when you're first starting off in the attack damage carry role for her long range and safety, but on the flip side - she has always been referred to as the "boring" champion just because of how formulaic her play style is.
What really sets her apart (apart from her rivalry with Jinx) is her position in the lore, she's the HBIC of one of the most renowned cities of the League of Legends world and the Caitlyn-Vi duo has made for some very "interesting" fan art on the web. Due to her popularity, Caitlyn is safely known as one of the most frequently cosplayed champions at gaming events - making for moments such as these, where an interviewer and friend tried to set up professional player Doublelift with an Officer Caitlyn cosplay, a moment that has been talked about/laughed at quite a bit by the boards because of the sheer awkwardness of the whole situation.
Caitlyn, the Sheriff of Piltover - one half of Piltover's Finest.