User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-213.106.131.123-20131031152845/@comment-1359322-20131101000314

Actually it's kinda doubtful if Issei can get any power up from Euclid's Boosted Gear since it was made by using Issei's old destroyed body + the Sephiroth Graal's power so it might just combined back with Issei's body.