These Devil Marks are the honorable ranks of every devil in hell that can say if their new in combat or veteran warriors.Also there some special mark that can say if you're good with bow, mage , swords , spears, etc.
Family SealEditThe Mark as evidence of been a Devilson , This one was implied by Krinky and Neko to determine if there were a Doppelganger Spy among of them, and to distiguish from the other royal families.
This is the highest rank for every devil in hell. Those who are worthy fighters and led an army in many wars . those who bear this mark are Krinky , Motts , Neko , and some other in their group. The mark is the face of Satan marked anywhere.