devtrackers.gg
What stands out to me here is that it seems like Yone was designed in a very "top-down" way. Rather than starting with an idea for a kit and creating a concept, they began with the idea of Yone and designed a kit for him. Both his fleshed-out backstory and his kit evolved from a desire to make Yone a champion.
I don't remember whether that was the case for Senna and Kai'Sa as well, but either way, it's cool to see. Most League champions seem to be designed "bottom-up", so seeing some top-down design like this is really interesting to me. I think it paid off, because his kit seems really effective at reflecting his story and lore.
This whole article is actually a really fascinating look into how narrative and gameplay design intersect in League, with a lot of moments of one influencing the other and vice versa. It's a great read for that reason.
Kai’Sa didn’t start like that from the very beginning but evolved into that while still is discovery. BravoRay drew a illustration spread while in discovery and one image was of this amazing looking “void diver” that Bravo said was Kassadins daughter. We all got super hyped and we’re like “yeah we should make that.”