User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-213.106.131.123-20131029113920/@comment-213.106.131.123-20131029121548

Ixarising, didn't Vali do a thorough background check on Issei and it turned out that he was completely normal, no supernatural ties, thats why Vali threatened to kill his parents. So I don't think he is Balor's descendant, Vali wouldn't of missed that.