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4th Hierarchical City of Naobi

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The 4th Hierarchical City of Naobi (第四階層都市「ナオビ」 Dai-Yōn Kaisō Toshi "Naobi") is the birthplace of Zero Squadron extraordinaire Tsubaki Yayoi. It is situated within Canada.


In year 2193, Relius Clover had managed to find the sealed Deus Machina: Nirvana buried in Naobi. Sector Seven sent a mercenary squad to retrieve it, while the NOL sent their soldiers with the same orders. They met after the mercenaries excavated Nirvana, and then Azrael appeared. Azrael, along with reactivated Nirvana, killed almost everyone present, only the captain of the mercenaries managed to survive, after Kokonoe Mercury injected him with Demon Cells. This event is known as the Phenomena Weapon Dispossession Operation.

Important people born in Naobi


  • The 4th Hierarchical City of Naobi is named after the Japanese god Kaminaobi no kami.
  • Tsubaki's earlier official profiles state that she was born in the 3rd Hierarchical City of Naobi, and the later state that she was born in the 3rd Hierarchical City of Iwasu. The Library Mode of BlazBlue: Chronophantasma Extend says that Tsubaki was born in the 4th Hierarchical City of Naobi.

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