Tập 12: Gasper phá hủy một vòng tròn, Vali lộ diện là kẻ phản bội, và Issei chiến đấu với hắn bằng sức mạnh của Boosted Gear.

12

The battle between the Magicians and the Three Factions continues as Gasper destroys the transportation circle used by the Magicians. Azazel kills Katerea after revealing his Artificial Sacred Gear, the Downfall Dragon Spear, but at the cost of an arm. Vali reveals that he is the traitor and laments that Issei is his rival. When he proposes killing Issei's parents to motivate him to become stronger, Issei furiously enters his Balance Breaker and battles Vali. Issei then takes a huge risk by absorbing in the power of the Divine Dividing into his Boosted Gear. Prompted by Azazel's comment Issei's power increases drastically and inflicts damage to Vali. As Vali prepares for a counterattack, Bikou intervenes and flees with Vali. After the fight, Issei asks Michael to allow Asia and Xenovia to pray to God without pain. Sometime later, in response to Sirzechs' request to help Issei, Kiba and Gasper master their Sacred Gear, Azazel becomes the new advisor of the Occult Research Club. He also tells them that Sirzechs has ordered the girls in Rias's peerage to move into the Hyodo Residence. As the girls move in, Rias asks Sirzechs to renovate the house. (Source: Wikipedia)