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Now you'll face the full might of the Mechanist, my righteous robots will end your tyranny once and for all!

The Mechanist (real name Isabel Cruz) is a robotics expert staying in the Commonwealth in 2287. She is the main antagonist of the Fallout 4 add-on Automatron.


Always talented with robotics, Isabel Cruz descended from a settlement plagued by raiders and super mutants.

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Inspired by drawings of the comic books and radio show character, the Mechanist, Isabel decided to use her skills for the betterment of the Commonwealth. Discovering a pre-War factory originally run in a juncture of private industry and the military, she set her plan in motion. Using the factory, she began constructing her robot "allies" to help the people of the Commonwealth, pacifying areas by killing raiders and other hostiles. Due to a logic error made by her robobrain lieutenants, the robots would kill everyone they encountered. This led to an attack on Ada's caravan, resulting in their call for help across the Commonwealth.

Interactions with the player character[]

Interactions overview[]

Icon quest starter
This character starts quests.

Rogue Robot

FO76 ui icon quest
This character is involved in quests.

Restoring Order

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This character is a merchant. Bottle cap 200
Sells: various items, including shipments


  • Restoring Order: The Sole Survivor confronts her and can either kill or save her. If things are resolved peacefully, she will remove her armor and offer it as a reward to the Sole Survivor.
  • Rogue Robot: If spared at the end of Restoring Order, she will request that the Sole Survivor hunt down one of her marauding machines.

Effects of player's actions[]

If Restoring Order is finished peacefully, Isabel will remain at the Mechanist's lair.



  • The player character can confront the Mechanist directly by loading the Lead engineer's, Facilities director's and Chief scientist's holotapes into the terminal in the room directly next to the decontamination/laser tripwire hallway near the lair's entrance, lifting the security lockdown and enabling the use of the elevator.
  • She has unique dialogue if the Sole Survivor is wearing the Silver Shroud costume, during the final confrontation.
    • This can be combined with the holotape access method to gain access to more unique dialogue.
  • If the Sole Survivor decides to let her live, she will then remain at the lair and but does not count as a settler, and does not require any resources nor can she be moved to another settlement.
  • Aside from her armor, Isabel also shares many other traits with the previous Mechanist, Scott "Bean" Wollinski:
    • They have skill with robots and sought out to make the wasteland safer but in actuality caused more harm than good.
    • They can be spared and thus realize the outcomes of their actions and seek out to heal what damage they caused.
    • Their hidden bases are in seemingly normal stores.
  • She will sometimes spawn in the hidden room at the end of the hallway, so if one cannot find her, try opening the door by pressing the button on the drinks machine.
  • If spared, she becomes a merchant. However, she is missing the "barter" option. Moreover, the "trade" option opens up to the barter screen.
  • Her character bio in Fallout Shelter Online specifies that she has autism spectrum disorder.
    • Besides canon confirmation, this can also be ascertained through dialogue with Isabel after getting her to shed the mask.
      • She claims not to be good with people, as can also be evidenced due to her awkwardness in conversation with the Sole Survivor.
      • She says to have always been better with machines than people, having not grown up with a lot of friends, and robots being her all she's ever had. Her first friend was a robot she created named Sparky.
      • She has a hyperfixation with the Mechanist, going so far as to make her own custom, and highly accurate suit. She's also able to perfectly imitate the Mechanist, mimicking his personality and speech patterns, which could be seen as a form of masking.

Notable quotes[]


Isabel Cruz appears as the Mechanist in the Fallout 4 add-on Automatron, Fallout Shelter Online, and Fallout Wasteland Warfare.

Behind the scenes[]

Before calling herself the Mechanist, she was just an ordinary girl who talked to robots on the autism spectrum. When everything turned into nuclear dust, she selflessly sent her robots to rescue survivors on the Wasteland. Soon, this group of robots came to a rational conclusion: Death is the best relief for humans in the Wasteland. It seems that the Mechanist has to provide after-sales service to prevent this group of dedicated robots from relieving humans of their lives.Fallout Shelter Online biography

This version of the Mechanist appears as an SSR-rank dweller in Fallout Shelter Online. Her biography in the game states that she is on the autism spectrum.


  • PCPC Playstation 4Playstation 4 Xbox OneXbox One Upon first encountering her, she may immediately become hostile. This may be caused by the targeting HUD mod.[verified]
    • This may be fixed by removing any item with the targeting HUD mod.
  • PCPC After the power goes out at the end of the fight, she may become immobile and won't initiate dialogue, never triggering emergency power.[verified]
    • This can be avoided by NOT shooting out the spotlights just before triggering the end showdown.
    • Alternatively, one can save and exit the game, then load up the recent save, and the fight should begin.
  • PCPC Playstation 4Playstation 4 Xbox OneXbox One If you are too powerful and kill the robots too fast, the factory will run out of robots before the power drains out leaving you in a state where the Mechanist sends only mines, bombs, and power discharges.[verified]
    • This can be avoided by using weaker weapons or waiting before killing them. The point is to keep at least one robot alive until the power drains out. It can also be prevented by not firing on any robots before they are fully deployed, at least until they are dropped.
  • PCPC The game may freeze when you try to access the console after getting the password from her.[verified]
    • This can be avoided by killing the two robots that sit above the console and block the Sole Survivor from correctly looking to the console screen.
    • Alternatively, one should get as close to the console as possible (into the space between the robots above it) before interacting with it.
  • PCPC Playstation 4Playstation 4 Xbox OneXbox One While wearing the Silver Shroud hat and armor, the Mechanist won't initiate the Silver Shroud-specific dialogue. [verified]
    • A possible fix is to look away from the Mechanist, unequip and re-equip the Silver Shroud costume.


Fallout 4[]


Major antagonists