|Nickname:||Artifical Demon No. 9|
SpoilerIt is revealed that that Braz captured him and delivered him to Stein as a test subject to perform his experiments on.
SpoilerAkimu was once a demon named Pantomime that worked for Daddy Wolf. He had the power to mimic any demon's special ability by seeing it performed only once. He mysteriously disappeared while on a top secret mission for Daddy Wolf.