Kishi is the absolute best manga artist I've ever encountered. The overwhelming majority of manga art involves nearly indistinguishable faces; the way they employ face shape, forehead size, eyebrow shape, and other subtle aspects of facial appearance to create a unique visual experience for each character is truly inspiring. It almost ruins other manga for me.
I mean, Chie is just the most impossibly cute character I've ever seen in a manga - I don't know how they've done it.