User blog comment:B214/Talk About What You Want! 2/@comment-24098614-20140524223305/@comment-24053170-20140524231949

Actually it wouldn't be a true nephalem, only a quarter nephalem as Issei is half dragon as well as half devil. a true nephalem can only be born from a full blooded angel and full blooded devil. Issei is not a full devil.