User blog comment:Mineko Charat Lucky/League and the Institute has nothing to do with League of Legends anymore(?)/@comment-9092778-20130816074653

Nami is supposed to look for the moon stone bearer, a strong individual, the savior of her people, wouldn't her best shot be entering the league home of many strong characters? Also making friends within the league wouldn't help her track this person much easier?

quinn's reason is very simple to understand, she's the master spy of demacia, keeping an eye on the forces of the league is her main mission probably considering that swain, katarina, ash, sejuani, etc are part of the league.

thresh is simply searching for new victims

lucien is trying to find tresh's weak spots before attacking and the easiest way to do it is ask around league for champions who fought against or alongside him.

same goes for tresh/kha

kha is probably searching for new ways to evolve himself and rengar is waiting for the perfect moment to strike while keeping an eye on his nemesis