Robin

Robin is Allen Walker's counter part. Robin's story is the same as Allen's but she instead brings back her sister Julia but failed and became an akuma that was converted by an exorcist that greatly resembles Cross Marian. She becomes an exorcist after her "master" gives her his left arm that contains innocence. Her only differences he does not share with Allen Walker is, that Robin is a female, has longer hair and while Allen Walker is British, Robin is French.