Kayn and Rhaast ARE straight out of an anime!

http://yesofcorsa.com/wp-content/uploads/2015/08/4052_soul_eater.jpg Soul Eater: "A sound soul resides in a sound body and a sound mind."

https://lolstatic-a.akamaihd.net/frontpage/apps/prod/rg-kayn-reveal/en_US/7b7b100afaedc0b04f7c2f150ee87cda080aa82d/assets/img/base-wallpaper.jpg Kayn: "Kill the body, build the body, free the body. Kill the mind, build the mind, free the mind."

Basically, Kayn is collecting enough souls for Rhaast to become a Death-Scythe, whether or not Rhaast kills him in the process.

EDIT: I didn't know which board to put this in, but Ionians being anime is a bit of a meme, so here we are.