The Madeiran Guardians

When 16-year-old Yukaio wakes up alone and without any memories of his past, he must rediscover his identity. After an encounter with the angel Uaithiel, he learns that he is one of the Madeiran Guardians - humans with Gods-blessed powers sworn to defend humanity from the forces of the underworld. Now, Yukaio must embark on a quest to find and reunite the other Guardians, but not everyone is ready - or willing - to accept their destiny. Their destiny is threatened by the demon, Amatheon, who will do everything in his power to stop the Guardians from succeeding. Will Yukaio be able to reunite the Guardians and help them master their own powers before Amatheon and the mysterious forces of darkness, or the Guardians own dark secrets, destroys them?