I know I'm quite late to the game.. but I just saw this and would love to try to do something for it. At least to improve my skills in this area. I really would love to become a good character artist.
Anyway. Love Riot, Love the game, love the characters and their personality.
My characters that I usually play, which is the ones I think about doing for this project, is: Diana, Syndra and Cassiopeia.
however I noticed that there is quite a few models out there for Syndra. Some for Diana too, but I haven't seen any for Cassio! So I'm going for her.
So this is the Cassio skin that I'm thinking of basing it of: Mythic Cassiopeia.
Can't wait to start this!