An experienced crew member infected by a parasitic force. He kills Ortega, attacks a security officer by biting his throat, and breaks into the admiral's quarters. After being shot and reanimating, he chases Noah before collapsing from cleaning fluid exposure and perishing after a grenade detonation.
Blue's infection transforms an apparent private encounter into murder.
Ortega finds Blue welding alone, and Blue turns on her and kills her.
Blue becomes a direct physical threat to Noah near the climax.
After becoming infected, Blue chases Noah. Noah uses a weapon and the effect of cleaning fluid to weaken him.
Teek is part of the group opposing Blue's infected form.
Teek helps identify Blue as the killer and later fights infected crew members, including the reanimated threat created by the outbreak.
Chambers provides the medical evidence that defines the threat.
Chambers performs an autopsy on Blue and reports that his body is completely hollowed out, confirming that a parasite is loose.
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