Board Thread:News and Announcements/@comment-856627-20160304022046/@comment-26229461-20160317075401

Sorry to bring this up again, but in BBF all agents are given, in English, titles like 'Border HQ S-rank' for Amou and 'Border Tamakoma Branch A-rank' for Reiji and so on. So it looks like, for BBF at least, S-rank and A-rank are the proper English versions of S級 and A級