Demacia Champions

So I was thinking about how all champions for Demacia seem to strive for justice. Like, they NEED justice. So I am surprised how there isn't a champion that sees justice in a twisted and cruel way. You can argue that Kayle turned out to be like this but her and morgana's lore has not been touched onto in a long time.

A good example of someone like this would be Seryu Ubiquitous, an antagonist in Akame Ga Kill. She wants justice for everyone but doesn't see how evil she really is. She also has a good background where her father was killed and now she seeks justice for all evil. Maybe this league champ could have their relative killed by not a noxian but another race to pit Demacia into another war?