User blog comment:B214/Question and Answers 6/@comment-2607:FB90:602B:5C13:E835:4052:FCDA:7AE0-20190129131644/@comment-10330822-20190130012333

Balberith and Verrine are supposed to both be Super Devils. Where exactly they fit in between Sirzechs, Ajuka, and Rizevim is unknown, other than they are stronger than Satan-Class.

Balberith specifically is supposed to have Dragon God-level potential. If that is the case, it would make him stronger than Sirzechs, the presumed strongest Super Devil, whose only Top 10.

As for Verrine, all that's mentioned is she is a Super Devil, meaning she's the strongest known female devil.