Mari was a synthetic employee of the Weyland-Yutani Corporation and a crewmember aboard the comet plasma harvesting ship USCSS November. She was serving aboard the vessel when it was infiltrated by a Xenomorph, the incident ultimately leading to the destruction of the ship and the death of its crew.

Unknown to her crewmates, Mari was in fact a synthetic sleeper agent seeking to secure a Xenomorph specimen for the company. Although she was destroyed by the Xenomorph that was loose on the November, she succeeded in dispatching several live specimens to rendezvous with a Weyland-Yutani deep space probe.


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