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My friends...they were simple traders. All dead at the hands of your robots.— To The Mechanist

Ada is a modified Assaultron living in the Commonwealth in 2287 and a possible companion of the Sole Survivor.


Ada is a heavily modified Assaultron robot with sentry bot and Protectron parts. She was created by Jackson and traveled with his caravan, which specialized in mechanical repairs and trade, throughout the Commonwealth. Jackson's caravan attracted the attention of the Mechanist and after three attacks, every member of the caravan except Ada had perished. Ada is first encountered during the quest Mechanical Menace during which the Sole Survivor must help Ada eliminate the robots that attacked her caravan. She is encountered just northeast of Wattz Consumer Electronics when her caravan is attacked the third time.

Interactions with the player character

Interactions overview

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This character is essential. Essential characters cannot be killed.
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This character is a permanent companion.
Icon quest starter.png
This character starts quests.
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This character is involved in quests.


  • Mechanical Menace: Ada and her caravan are under attack from the Mechanist's robots, and it's up to the Sole Survivor to try and save them.
  • A New Threat: Ada and the Sole Survivor travel to the General Atomics factory to engage the Mechanist's forces.
  • Headhunting: After finding the first radar beacon, Ada tasks the Sole Survivor in finding more - in hopes of leading them to the Mechanist.
  • Restoring Order: Ada now knows the location of the Mechanist - it's time to stop them once and for all.
  • Rogue Robot: If Isabel Cruz is killed at the end of Restoring Order, Ada can be asked to scan for remaining Mechanist robots in the Commonwealth.


Apparel Weapon Other items On death


  • If dismissed, and no location is specified, she will relocate to the Red Rocket truck stop, but will not count towards that settlement's population. If a location is specified, including the Red Rocket truck stop, she will count towards the population of that settlement.
  • When she is the companion, upon talking to her she can give several random junk items, a trait she shares with all player-built automatrons that have their personality subroutines activated.
  • She is one of three companions that can be ordered to steal owned items.
  • She is one of three companions (excluding Automatrons) modifiable at the robot workbench, the others being Curie (in her Ms. Nanny body) and Codsworth.
  • She is the only companion aside from Dogmeat that doesn't care about the Sole Survivor's actions at all. She will offer advice and her opinion depending on the situation like any other companion but will never gain or lose affinity. As a result, there are no affinity perks to be gained from Ada.
  • Being a modifiable robot, Ada can be upgraded with lockpicking or hacking capabilities to cover for the Sole Survivor's potential shortcomings in any of those fields, should Cait or Nick Valentine be unavailable.
  • She will not ride as a passenger on a Vertibird.
  • If taken to Vault 111 to see the Sole Survivor's spouse, she will not make any comments.
  • Ada uses the same body animation (hands and legs) when equipped with a head laser or mesmetron (robobrain head).
  • Ada will lament on not having a vacuum attachment when entering certain cluttered or dirty rooms.
  • While still a companion character, no remarks will be made about Ada in her presence as there would be for other base companions.
  • If the player character takes off all clothes while with her, she may remark "people look so strange without their clothes on" or "running around without clothes on doesn't seem like the smartest thing to do in an environment like this."
  • If the player character invites the Vault-Tec rep to Sanctuary Hills while Ada is at their side, they will comment that "they will like it in the suburbs."


Ada appears only in the Fallout 4 add-on Automatron.

Behind the scenes

Some of Ada's dialogue lines are references to pop culture and science fiction. For example, "resistance is futile" is a reference to the Borg in Star Trek. After using a terminal, Ada may say "Using a keyboard. How quaint.", a reference to a similar line from Mr. Scott in Star Trek IV: The Voyage Home. Another one is found during Restoring Order when she mentions "It feels like: Poetry in motion," referring to the popular song by Johnny Tillotson in 1960. She will also say, "If you don't eat your meat, how can you have any pudding?" in any school location. This is a reference to Another Brick In The Wall, Part 2 by Pink Floyd.


  • PCPC Playstation 4Playstation 4 Xbox OneXbox One During the quest A New Threat, when one has to install the Radar Beacon on Ada with the robot workbench, only the option to modify her legs will be available, making the quest impossible to complete. A possible fix is to shoot Ada until she is crippled. [verified]
  • Playstation 4Playstation 4 Ada can be commanded to pick up an infinite amount of items using the command action thus making her carrying capacity unlimited. [verified]
  • PCPC Playstation 4Playstation 4 Xbox OneXbox One When commanded to hack a terminal she won't acknowledge the command and continue to behave as if it was never given. Fix - Requires the game to be restarted. [verified]
  • PCPC Playstation 4Playstation 4 Xbox OneXbox One As a companion, Ada will repeatedly back up and run into the player.[verified]
  • Playstation 4Playstation 4 Will sometimes disappear without a trace. Fix - Select a new companion.[verified]
  • PCPC Playstation 4Playstation 4 Xbox OneXbox One Ada will behave as if you went to confront the Mechanist by yourself, asking questions like "what did she say?" even if she is present—and spoke—during the final dialogue. [verified]
  • Playstation 4Playstation 4 There is a chance you will not be able to talk to her at all if nearby raiders interrupt the conversation when first responding to the caravan distress call. [verified]
    • To prevent this, make sure the area is clear of them before talking to her.
  • Playstation 4Playstation 4 Ada’s pathing appears to be bugged; if commanded to go somewhere or do something she may choose an unnecessarily long or impossible route. If she is caught on small pieces of irregular geometry i.e. rubble, she will tell the player she cannot go where commanded instead of walking around it. [verified]