Akasha is Shishidou perhaps one of the pithiest villains after knowing the reason behind his betrayal against the Kougon Cult. In his youngest days, he was one of the top aces in the Cult. He was proud and strong in his faith, until one day he was forced to kill his Shikabane Hime, who was his fiancee when she was alive.
After being forced to kill his own Shikabane Hime, he went into exile for five years. No news about him was heard until a series of recent events—a resurrection of many corpse cases.
The truth about the lies behind the promise of Shikabane Hime killing 108 corpse to ascend into heaven.