User blog comment:B214/High School DxD EX/@comment-50.139.232.230-20150728035746/@comment-79.175.64.126-20150729202220

Issei is humanoid True Dragon reincarnated into devil. He has no human blood. Reincarnated Devil and Pure Blood Devil child is Half blood like Snapes :D. You can consider Ix half devil half heavenly dragon.

His gauntlet is maybe same sacred gear like what Euclid had. He can't have boosted gear because host (his father is current Sekiryuutei).