Hideo

英夫

He is the uncle of Junpei and Kanta, as well as Tatsuo's brother. Throughout the film, he is portrayed as a very carefree and rather childish character who "doesn't know how to die." At the start, he secretly left the island with the aid of Junpei's bond fire. After arguing with his brother, Tatsuo, over the boy's teacher, Sawako, he went out and was caught accessing the supply cave Tatsuo had kept secret. It is believed that he was the one who informed the Russians about Tatsuo, though he denies this. After arriving in Russia alongside Junpei, Kanta, and Sawako, he appears to mature gradually, doing his best to continuously keep the group out of harm's way.