A look at Ekko
So this is one of the lores which I honestly found to be the worse(exclusion to Skarner's and Rammus' which is pretty much just "WIP"). Basically: Ekko has a machine that can reverse time One day his friend dies His machine breaks and he cannot travel back to save him
Now there are a few details that make this lore pretty bad. First off Riot from what I remember in their AMA claimed Ekko was suppose to stand on the more good/heroic side for Zaunite characters. Yet after finding out his friend got shot because he tried robbing a man he decides to go on and attack the killer himself. That really isn't a heroic/good thing at all, and although I dislike the term "victim blaming" that was pretty much what his lore was.
Also he blatantly discriminates against people from Piltover, for what seems to be no good reason at all other than Piltover is way better and more civil than Zaun.