People who don't know League of Legends often underestimate it. They hear news about the MOBA or hear talk about the competitions, understand there are different characters, but don't really get how much work Riot Games really puts into them. These are each unique individuals with lore surrounding them.
What makes these League of Legends characters even more special is how some have special interactions tied to them. These are hidden away and only trigger under certain circumstances, perhaps even if specific characters appear in a match. It's incredibly intriguing and knowing they're there enhances the game for beginners and veterans alike.