Takeo Tsurumaru (鶴丸 丈夫 Tsurumaru Takeo): One of the passengers who disappeared from Shiina's plane flight, whom she confuses with the writer of a threatening note. He helps Shiina and Akira many times, although he does not always understand where his responsibilities should stand. He is quite lecherous, having five illegitimate children and three girls pregnant during the course of the series. Eventually, he impregnates Shiina too, but right before that she teaches him that there is a difference between love and procreation.

In volume 10 Takeo gets caught in a nuclear explosion while trying to escape the hellfire of U.S. soldiers attacking an escaped dragon, and later shows obvious side effects of radiation poisoning, including severe scars and complete hair loss. In volume 11 Takeo kills some of the city thugs - mostly the same ones who kidnap and murder his best friend Norio in Volume 10 and rape Mamiko in Volume 11, including the thug who tortured, raped and killed Norio. Almost at the the end of volume 12, Shiina says she loves him and they have sex, which leads to Shiina becoming pregnant.

In Volume 12 of the manga, the remaining city thugs shoot him to death in his chest at his apartment. For unexplained reasons Hoshimaru (his dragonchild, not Shiina's as many thought) cannot manage to transform him into a virgin princess. Takeo's death is the last straw that triggers Mamiko's destruction and rebuilding of the human world.

His seiyuu is Eiji Miyashita.

Source: Wikipedia