Kiba, Yuuto

木場祐斗

An 11th-grade student. He claims to be Issei's best friend and is known as the school prince. He was a victim of "Project: Holy Sword," being the only sole survivor. He became Rias's servant after she saved him from death, yet he still swore to accomplish his revenge against those who treated him as a test subject and disposed of his friends. He also harbors a great hatred toward the holy sword Excalibur.
Yuuto made his appearance in Volume 1, bringing Issei to the Occult Research Club under Rias's orders.
As a Knight, Kiba possesses superhuman speed and is heavily skilled in swordsmanship, which Issei has called God-Speed.
Kiba's primary weapon is the Sacred Gear "Sword Birth," which has the ability to create an infinite number of Demon Swords at his disposal, such as the Holy Eraser and Flame Delete. He later obtains a sub-species Balance Breaker called "Sword of Betrayer," which is a fusion of a Demonic and a Holy Sword. He received it during the fight with Freed after he "merged" his Sacred Gear with the spirit of his comrades.