There are class ranks for everyone. F is the lowest which arep oor people. E is Commoners, D is small business owner, C is A merchant, B is an adventurer, A is a strong adventurer or a low noble. S is Nobles, SS is Politicians, SSS is high class adventurers, VS is for people like the Pope, VSS is A king, VSSS is an Emperor, U is for some of the most important people, AU is for highest class adventurers, SU is someone who rules the world, and ERROR is for anyone who goes above the very stars.