Atsune Hirata

A member of the Magical Investigations Bureau who works under Amami. He is in charge of investigating the "Twin Horns Syndicate."

[Spoiler] In truth, he was working with Twin Horns Syndicate and was Yakou devotee but betrayed them and left them to die when Magical Investigations Bureau attacked. He was defeated by Amami. [/Spoiler]

[Spoiler] It turns out that his real identity is Takiko Souma. [/Spoiler]

(Source: AniLinkz)