I don't actually like this game that much, but some of the character designs are cool.

https://www.leagueoflegends.com/en-pl/champions/elise/ - EIE
https://www.leagueoflegends.com/en-pl/champions/vayne/ - LSI
https://www.leagueoflegends.com/en-pl/champions/gnar/ - SLE
https://www.leagueoflegends.com/en-pl/champions/jinx/ - IEI