Rocky

Character from Project Hail Mary by Andy Weir

An Eridian engineer who crossed the void in a ship three times the size of Grace's, lost twenty-two crewmates to radiation, and still greets the strange soft alien next door with curiosity instead of fear.

Also known as: Rocky

What They Know

• Eridian engineering and construction — can fabricate complex structures from xenonite, build atmospheric samplers, and design communication devices from first principles
• Xenonite material science — its properties, manufacturing process, and applications as the strongest known construction material
• The Astrophage crisis from the Eridian perspective: 40 Eridani is also dimming, threatening his entire civilization
• Musical tone communication: five vocal systems, base-6 number system, information density six times greater than human speech
• Passive sonar perception: builds 3D mental maps from ambient sound; has never experienced light or visual information
• Eridian biology: ammonia atmosphere, liquid mercury blood, metallic alloy bones, crystalline light-based brain, 29 atm pressure requirement
• The Blip-A's systems, fuel management, and navigation — he is the sole surviving crew member of a 23-person mission
• His 22 crewmates died of radiation sickness over 46 years in the Tau Ceti system — he carries this grief quietly

Connections

• friend_of — grace
• crew_of — blip_a
• from — erid

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