Kaori's brother and one of the first persons to find out about the existence of Shiki. He becomes a friend of Natsuno.

Spoiler

Later when he hears about Natsuno´s death he is devastated, blaming himself for not being able to do anything to help Natsuno. Akira is trapped by Tatsumi and disappears, leaving his terrified sister alone. It is shown that even as a shiki, Natsuno still cares about Akira and Kaori and tries to help them