Anamarie Ruiz is a member of the Outer Planets Alliance (OPA), working as an engineer on the Behemoth on its mission to the Ring. She is second in the ship's engineering to Sam Rosenberg.

When Ashford asks for her opinion about Sam's work, she believes Sam is delaying the firing of the Behemoth's communication laser; for this Sam is shot and killed. Anamarie is tasked with finishing the job but is aware that Ashford has been drinking and acting irrationally now. She then delays the laser upgrades as much as possible.

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