Allen is an orphan,his parents abandoning him because they thought his mutation
was evil. He was found on a Christmas day by his future adoptive father Mana Walker. Years later Mana dies and Allen torn by grief makes a deal with Millennium Earl to resurrect his father. But he was double-crossed and his father is turned into a akuma(demon) an curses Allen by injuring his left eye witch can now detect akuma. He is later recruited into the Black Order to become a exorcist thanks to his master Cross Marian. his Anit-Demon weapon arm can turn in to anything he chose for example when he first does this he makes a Gun and then a Sword but doing this for a long period of time causes major strain to himself.
- Height: 168 cm
- Weight : 58 kg
- DOB : Unknown was adopted on December 25th