Allen Walker (アレン・ウォーカー, Aren Wōkā) is a soft-spoken and warm-hearted 15-year-old Exorcist of British origin and the main protagonist of the series. Allen was abandoned by his biological parents because of the supposed "deformity" of his left arm and later adopted by Mana Walker. Later, Mana died and Allen turned him into an Akuma, hoping him to be fully resurrected but instead, he cursed Allen and sliced through his left eye, giving 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 until he was sent to the Black Order headquarters to officially become an Exorcist. His parasite-type anti-Akuma weapon goes through two different forms resembling giant arms until it reaches its true form, the Crown Clown (クラウン・クラウン, Kuraun Kuraun), which takes the form of a type of body armor 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. Shortly after his anti-Akuma weapon takes the form of Crown Clown, his synchronization rate surpasses the percentage required for General level. It is said the 14th Noah implanted his memories into Allen, leading Malcolm Lvellie to place him under suspicion. He fights for the souls of the Akuma to avoid anybody else going through the pain he was in when Mana died. He is voiced by Sanae Kobayashi.