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The Vault - Fallout Wiki
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For the Mechanist who appears in Fallout 3, see Scott Wollinski.
Isabel Cruz
IsabelCruz HumanCharacter FO4.pngIsabelCruz2 HumanCharacter FO4.png
Biography and appearance
Hair StyleUnscrupulousHair ColorJet black
Eye ColorBrown
RoleMisguided antagonist
LocationThe Mechanist's Lair
Dialogue FileIsabel Cruz's dialogue
Combat StyleDLC01csMechanist
assistanceHelps friends and allies
SPECIALStrength: 8
Perception: 8
Endurance: 8
Charisma: 1
Intelligence: 1
Agility: 8
Luck: 1
Tag SkillsCourserClass
Editor RaceHumanRace
Editor IDDLC01Mechanist
Base IDxx0008b2Ref IDxx00097c
Editor FactionsDLC01MechanistFaction
ActorStephanie Lemelin

It's strange how the suit makes me feel so confident when I put it on. It's like being a different person.

Isabel Cruz, Automatron

Isabel Cruz, also known as the Mechanist, is a robotics expert living in The Mechanist's Lair in 2287.


When Isabel was a child, she was as timid and soft spoken as she is today and did not have many friends, so robots and comic books were really all she had growing up. In fact, Sparks was the first robot she assembled and her first real friend.[1][2]

Later in life, Cruz came across a ransacked caravan where she found a drawing of the Mechanist, a comic book hero from before the War, and she decided she wanted to bring that character to life; in her own words, "it was too late to save that caravan, but becoming the Mechanist was [her] way of keeping hope alive."[2] She was initially drawn to the Commonwealth by the General Atomics factory, but she never expected to stumble upon a military base dedicated entirely to robotics beneath the RobCo sales and service center. Doing what she did best, Cruz built incredible robots from what she could find, and hoped to save the Commonwealth.[1]

To this end, she tried her hand at recreating robobrains after recovering some schematics, and succeeded assembling her own model which she designated Jezebel. However, this robobrain was captured by the Rust Devils.[3] But Cruz was not discouraged; if anything, Jezebel's absence prompted Cruz to update several of the robobrains already present in the facility to handle menial tasks, and bring the facility's command center back to its original functional state. Furthermore, she took a new mission upon herself: saving the Commonwealth. She had hoped that her expendable robotic army could police the region (even within a 15 mile radius) and protect the denizens of the wasteland.[3]

This would have been all well and good, but the robobrains Cruz programmed to direct the other robots misinterpreted their programming: they were programmed to save wastelanders, but in doing so, they reasoned that the best way to do this was to terminate them. Probabilities suggested that there was a better chance of the wastelanders dying of unnaturally violent causes than live through them; therefore, it was best to end their existence immediately, rather than prolong their suffering and impending expiration.

Completely unaware of this flaw in their programming, Cruz continued her reign of terror as the Mechanist, sending her robots all over the Commonwealth.[4] The reign only came to an end when the Sole Survivor confronted her in her lair.[5] Should she be talked down and convinced of the errors of her ways, Cruz will feel extremely remorseful and betrayed, both by her robots and herself. She looks at everything she accomplished, how she programmed her robots to do good, and how it all blew up in her face.[6] As recompense, she remains quite busy tracking down rogue robots, still waiting for the truth about her actions to fully sink in.[4][7]

Interactions with the player character

Interactions overview

This character is a merchant. Sells: Crafting components, inc. shipments of rare components.
This character starts quests.
Perk empathy synthesizer.png
This character is involved in quests.


  • Restoring Order: The Mechanist must be dealt with one way or another.
  • Rogue Robot: If Isabel Cruz is spared and talked down, she will provide the whereabouts of other robots that continue to terrorize the Commonwealth.

Other interactions

  • If Isabel Cruz is spared and talked down, she will become a merchant. Most notably, she sells shipments of fiber optics.


Icon armored vault suit.png
Mechanist's armor and helmet
Mechanic jumpsuit
Assault carbine icon.png
Protecton's Gaze
Mr. Handy buzz blade
2x Pulse grenade
Icon briefcase.png
Carried items
2x Stealth Boy
3x Stimpak
Icon male severed head.png
Drops on death



Isabel Cruz appears only in the Fallout 4 add-on, Automatron.


  1. 1.0 1.1 The Sole Survivor: "What started all this? The suit, the robots. It had to be something."
    Isabel Cruz: "You wouldn't understand."
    The Sole Survivor: "Try me? I can be pretty understanding."
    Isabel Cruz: "That's easy to say... I just didn't have much in the way of friends while I was growing up. Robots are all I've ever really had. Sparks was my very first creation. My very first real friend. The General Atomics Factory originally drew me to the Commonwealth. I never expected to also find this entire military base dedicated to robotics. But... I did, so I did what I knew best. I built amazing robots and hoped to save the Commonwealth. And I guess you know the rest of that story."
    (Isabel Cruz's dialogue)
  2. 2.0 2.1 The Sole Survivor: "So tell me: why the Mechanist? How'd you come up with that?"
    Isabel Cruz: "It's a little silly. I found the idea, this... drawing, at a ransacked caravan. It was like, some sort of hero that someone had created. Even made their own posters. I took what I could and decided I wanted to bring that hero to life. It was too late to save that caravan, but becoming the Mechanist was my way of keeping hope alive."
    The Sole Survivor: "All this inspired by a drawing?"
    Isabel Cruz: "I know how it sounds, but the only things I had beside robots were comic books. I used to... dream about being a hero. Everything just came together. I thought the Mechanist was the next logical step."
    The Sole Survivor: "At least you tried. It's more than most people do these days."
    Isabel Cruz: "True. But I think we both agree, I'd be better off if I never found this place."
    (Isabel Cruz's dialogue)
  3. 3.0 3.1 Mechanist's log
  4. 4.0 4.1 Rogue Robot
  5. Restoring Order
  6. The Sole Survivor: "Do you feel like the robots betrayed you?"
    Isabel Cruz: "In a sense. In some cases, I feel like I betrayed myself. I look at everything and managed to accomplish... just to screw it all up. I trusted my robots and my ability to program them to do good. And it... all blew up in my face. Anyway, I better get back to doing... something."
    (Isabel Cruz's dialogue)
  7. The Sole Survivor: "How are you doing, dealing with all of this?"
    Isabel Cruz: "I've been better. Just trying to keep busy. Sometimes I feel like the truth is still sinking in."
    (Isabel Cruz's dialogue)