Allen Walker is a soft-spoken and warm-hearted Exorcist of British origin and the main protagonist of the series. Allen was abandoned by his biological parents and at the age of seven, he was adopted by Mana Walker. After Mana died, Allen turned him into an akuma, hoping him to be fully resurrected. Instead, Mana cursed Allen, slicing his left eye which gave him the ability to detect disguised akuma.It was at this same moment that Allen's left arm first awoke as an anti-Akuma weapon and instinctively destroyed the Akuma. He was later found by Cross Marian and trained as his disciple for five years, before he was sent to the Black Order headquarters to become an official Exorcist. His parasite-type anti-akuma weapon is the Crowned Clown, which takes the form of a type of fur cape and a giant claw. Later on, it is able to additionally produce a large sword from Allen's left arm, resembling the sword the Earl uses. Recently, allegations have arisen against Allen especially Malcolm Rouvelier, as the successor to the 14th Noah. Despite this discovery, Allen remains devoted to fighting with the consciousness of the 14th, and save as many Akuma as he can.