User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-37165251-20181209183528/@comment-36663391-20181210144002

This is good plot twist, but the other 2 can become Super Devil but for 2 they are "only stronger than a Satan class" how is possibile than they compete with Verrine? Ok in future they will be Super Devils so a dangerous... Your theory is good but I need more time for give a conclusion about how will end... I have a problem now, if Issei is become to defeat Balberith that is Dragon God level, Indra should not be a serioulsy danger for Issei after the figth with Balberith... Maybe is like how I believe: Issei can't using the GR power when he want, but only in situations of extremely dangerous( Should be a good way for make a citation to the Ultra Istinct).