Kyouko Meijiro is a private detective & vampire hunter who goes by the name Anko Ugusiu. In a world where vampire live along with humans, Anko is a woman who's defined by her deep hatred for vampires. When it comes to them, Anko is ruthless & brutal, determined to wipe every single vampire off the face of the earth. However, outside of her work, Anko is a observant, yet casual woman. However, in the blink of an eye, she can switch to dead-serious to unsettle whoever she's interrogating.