Takeo Tsurumaru

A mysterious passenger who vanished during Shiina’s flight, this man becomes a central figure when Shiina mistakes him for the author of a threatening letter. While he frequently assists Shiina and Akira, he often struggles to define his true role or boundaries within their group. His unpredictable nature is matched by his highly promiscuous lifestyle, characterized by numerous illegitimate children and a recurring pattern of complicated romantic entanglements throughout the series.