Exorcism
In Christianity, exorcism is the practice of casting out demons. In Christian practice the person performing the exorcism, known as an exorcist, is often a member of the Christian Church, or an individual thought to be graced with special powers or skills. The exorcist may use prayers and religious material, such as set formulas, gestures, symbols, icons, amulets, etc. The exorcist often invokes God, Jesus and/or several different angels and archangels to intervene with the exorcism. Protestant Christian exorcists most commonly believe the authority given to them by the Father, Son, and Holy Spirit (the Trinity) is the source of their ability to cast out demons.
List of D.Gray-man characters
In addition to those Exorcists chosen by Innocence, there are Exorcists referred to as Second Exorcists and Third Exorcists. The Second Exorcists were created nine years ago as part of the Synthetic Disciple Project, forced upon the Chan and Epstein families by Central; they are created by transplanting the brains of deceased Exorcists into new, artificial bodies, in hopes of re-synchronizing the Innocence. Yu Kanda and Alma Karma are the only successful subjects in this group. Using a piece of the original Akuma Egg, members of the Black Order also created the Third Exorcists. The Third Exorcists are fused with dark matter and Alma's cells to become partially Akuma themselves; they gain mutated arms that can absorb and destroy Akuma.