Different with or without mask

each Helldragon is given a different mask there's various reasons why they must wear it during battle's. for Aokage King Of Nightmare, to hide his kind face. in return when wearing the mask. everyone can feel being chased by reaper. while Eater the Immortal Eater she looks gluttony for exchange hidden her charming side. reference from japan mask. Hannya's mask looks pretty scary but the expression looks sad, right?