Akago/Hakudoushi is Naraku's detachment, created while Naraku was undergoing his transformation into a true demon at Mount Hakurei. He is the embodiment of Naraku's human heart, however, only Onigumo's perverse-nature and immorality made the transfer, leaving the human's feelings for Kikyo in the imps within the "whole-demon" Naraku. Of all of his incarnations, Naraku treasures Hakudoushi the most, as his life depended on Hakudoushi's well being.Akago has the power to go into the darkness of people's hearts, using his host's abilities as his own. He even momentarily possessed Kagome, as her ability to find the Shikon Jewels is useful in his mission to find the final Shikon Jewel Shard. But it ended up with Akago sliced into two. He regenerated/matured from one half and was given dominion over his new bodyguard/nanny Kagura. This is Hakudoushi. The other half (which held Naraku's heart) became an infant, who is the source of not only the very existence of Naraku, but Hakudoushi's life as well.Hakudoushi eventually learned of his new power to read the minds of the dying, revealing that the final Shikon shard is at the gateway into the land of the dead. As a result, he goes on a killing spree to catch brief glimpses to give him clue of the gateway's location.
