Kurogane Communication (1998)
Original title: 鉄コミュニケイション
Kurogane Communication is a 1998 Japanese-language animation series created by Tomomasa Takuma and Hideo Kato. It stars Yui Horie, Etsuko Kozakura and Hiromi Ishikawa.
In the near future, Earth has been devastated by an immense war. Haruka, a girl living in the ruins of Japan with five robot companions, may truly be the last person on earth. Amid the desolation and constant attacks from Combat Machines whose war will never end, Haruka fights to find a way of life, and track down other human survivors.