User blog comment:B214/Talk About What You Want! 2/@comment-4547267-20140527014509/@comment-3965848-20140527065223

If Issei never joined Rias and was still a normal human (Im guessing you mean he never had the BG), then all the major events would different like:


 * Issei would have never been killed and still single and disliked by everyone


 * Raynare would have probably been killed by Diodora insted


 * Asia would have been reincarnated into Diodora's Peerage


 * Rias would be married to Riser (who would still be a jerk)


 * Kiba would have become a stray devil for going on his own to destroy the Holy Swords


 * Koneko would have been kidnapped by her sister in Vol. 5


 * The war against Loki would be lost with Baraqiel dead and Akeno in a mental state


 * Ddraig would be in a different host and the fight between him and Albion would still continue


 * The underworld would have been destroyed in Vol.12


 * Oveall the Khaos Brigade would won the battle in the end with the revival of 666