Battle Angel Alita Wiki
BAA06 31 Factory 1010 Station Gate
The Factory 1010 Station Gate bordered by the Hydro-Wall in Battle 31
Type Defensive wall
Creator Factory
Users Scrapyard
Debut Battle 31

The Hydro-Wall is a defensive wall surrounding the outer boundary of the Scrapyard, revealed in a map in volume 1 of Gunnm Works to form a massive circle around the city.[1] It is a fountain of super viscous liquid that is projected 20 meters into the air by a high pressure electromagnetic pump.[2] The only breaks in the Hydro-Wall are the 11 Station Gates which control access to the Scrapyard.


The Hydro-Wall was first described after Alita had been recruited to become a TUNED agent and the story moved forward ten years. When Den charged the Scrapyard in ES 590, he smashed through the Factory 11 Station Gate, leaving the Hydro-Wall bordering it intact.[3]


  1. Gunnm Works vol. 1, p 4.
  2. Battle 31 - The Hydro-Wall is described.
  3. Battle 50 - Den charges into the Scrapyard.