Let's get this out of the way, MC will not be using these realms at all. She will use the easier way of just saying a letter. This is just for the side stories following the cultivator girl, if I even continue writing it lol.
F-rank ------> Human Realm
E-rank ------> Martial Apprentice
D-rank ------> Martial Master
C-rank ------> Emperor Realm
B-rank ------> Ultimate Emperor Realm
A-rank ------> Divine Emperor Realm
S-rank ------> Martial Sovereign
SS-rank ------> Divine Martial Sovereign
SSS-rank ------> Psuedo-Immortal Realm
X-rank ------> Immortal Realm
Y-rank ------> True Immortal Realm
Z-rank ------> Martial God Realm
Inner God rank ------> Divine Martial God Realm