Vayne has the best agreement between gameplay and backstory of any champion

http://universe.leagueoflegends.com/en_US/story/champion/vayne

After the support steals her kill, she immediately starts flaming and goes in 1v5.

The only part I thought was off was that they didn't include what happens after she gets killed. Obviously, she would meet up with Frey in the afterlife and tell her to uninstall.

Other than that, perfect execution, Rito.