*Good*No blushing on the cheeks, but can sweat.*Bad*Mouth shouldn't open more than necessary.My personal rules of Kokoro-chan's facial expression.No highlight in the eye.Eyebrows never move.At a level where one doubts the existence of her facial muscles.Note: These are just my personal definitions.
I have no intentions of forcing them onto others.Because she's full of emotions but doesn't show facial expressions, her body language is overreacting.
