Akino is a member of the group to which Keita Minato belongs. ~!After Fujino awakes her Mystic Eyes, she sets about murdering each of the members. He is the fifth victim before Kouhei, Fujino questioning him on the location of Keita before killing him.!~

(Source: TYPE-MOON Wiki)

July, 1998: One night, Mikiya helps a girl lying doubled over with stomach pains. Around that time, a number of dismembered bodies are found throughout the city. The murder victims are torn apart so badly that they don't seem like the work of a human.
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(Source: Aniplex USA)