The Expanse

by James S.A. Corey

85 characters, locations, and items in this world codex.

Characters

• James Holden — Idealist captain of the Rocinante — a Montana farm boy whose compulsive transparency ignites solar-system-wide crises, making him both humanity's cons
• Naomi Nagata — Belter engineer and XO of the Rocinante — a genius who can rebuild a reactor from scrap but cannot escape the gravity well of her past with Marco Inar
• Amos Burton — The Rocinante's mechanic — a man who grew up feral in Baltimore's criminal underworld and outsourced his moral compass to people he trusts because he
• Alex Kamal — The Rocinante's pilot — a Texan-drawling Martian who left his family to chase the sky and found a new one among misfits, flying with an instinct that
• Bobbie Draper — Martian Marine turned Rocinante gunner — a Polynesian warrior built for power armor who lost her squad to the protomolecule and rebuilt herself into s
• Clarissa Mao — Daughter of a disgraced billionaire who tried to destroy Holden to restore her father's name — reformed through prison and penance, she joined the cre
• Chrisjen Avasarala — Earth's most dangerous grandmother — a tiny Indian politician in silk saris who swears like a dockworker, plays power like a grandmaster, and will bur
• Sadavir Errinwright — UN Undersecretary who backed the protomolecule weapons program — a patrician diplomat who convinced himself that arming Earth with alien bioweapons wa
• Annushka Volovodov — Methodist minister in a universe of killers — a genuinely compassionate woman who insists on seeing humanity in everyone, even when the evidence argue
• Admiral Souther — Old-guard UN Navy admiral who chose honor over orders — a career officer who refused to fire on allied ships and paid the ultimate price for military
• Admiral Nguyen — Errinwright's military enforcer — a UN admiral who obeyed illegal orders with zealot's conviction, firing on his own fleet because he believed the pro
• Cotyar Ghazi — Avasarala's spy and bodyguard — a sardonic professional who does the dirty work of diplomacy with a handgun and a dark sense of humor, loyal to one wo
• Secretary-General Gao — Avasarala's successor as UN Secretary-General — a moderate consensus-builder who inherited a system on fire and tried to govern through caution in an
• Admiral Smith — UN Navy admiral in the Laconian era — a practical military commander navigating impossible odds against a technologically superior enemy, competent en
• Josephus Miller — Star Helix detective on Ceres who fell in love with a dead girl's ghost — a world-weary noir cop who followed the Julie Mao case into the protomolecul
• Frederick Lucius Johnson — The Butcher of Anderson Station turned OPA leader — a former UN Marine colonel who massacred Belter civilians under orders and spent the rest of his l
• Camina Drummer — Belter captain who rose from Fred Johnson's protege to president of the Transport Union — hard as vacuum and loyal as gravity, torn between Belt unity
• Klaes Ashford — Old OPA pirate who found honor late in life — a veteran Belter raider who surprised everyone, including himself, by choosing duty over survival when t
• Anderson Dawes — OPA political boss of Ceres — a charismatic Belter leader who plays the long game with a revolutionary's conviction and a diplomat's patience, dangero
• Michio Pa — Free Navy captain who defected to protect civilians — a polyamorous Belter officer torn between revolutionary loyalty and the realization that Marco I
• Diogo Harari — Young Belter OPA fighter — an enthusiastic, reckless kid who treats revolution like an adventure, embodying the Belt's angry youth who have nothing to
• Samara Rosenberg — Tycho Station's chief engineer and Naomi's closest friend — a brilliant mechanic whose enthusiasm for impossible engineering problems makes her indisp
• Marco Inaros — Charismatic Belter revolutionary who weaponized asteroids against Earth, killing billions. A narcissistic terrorist who twisted the Belt's legitimate
• Filip Inaros — Marco and Naomi's son, raised by his father and indoctrinated into extremism. A young man struggling to reconcile love for his father with the growing
• Sanjrani Rosenfeld — Marco Inaros's political strategist and the pragmatic brain behind the Free Navy's governance. Competent, calculating, and far more dangerous than the
• Juliette Andromeda Mao — Wealthy heiress who rejected her father's empire to fight for the Belt, then became the protomolecule's first human template when infected on Eros. Mi
• Jules-Pierre Mao — CEO of Mao-Kwikowski Mercantile who funded protomolecule weapons research through Protogen, sacrificing his own daughter and countless children for pr
• Paolo Cortazar — Brilliant Protogen scientist and clinical sociopath who studies the protomolecule with detached fascination. Later recruited by Duarte to build Laconi
• Elvi Okoye — Xenobiologist and POV character who becomes humanity's foremost expert on Ring Builder technology. A compassionate scientist navigating alien mysterie
• Fayez Sarkis — Geologist and Elvi's husband whose sardonic humor and steady presence provide emotional ballast in a story full of alien horrors and military dictator
• Winston Duarte — Former MCRN admiral who stole a fleet, colonized Laconia, and built an empire using protomolecule technology. A philosopher-king dictator who injected
• Santiago Singh — Young Laconian governor of Medina Station whose idealism curdles into authoritarianism. A POV character who demonstrates how even well-meaning people
• Admiral Anton Trejo — Laconian fleet admiral and Duarte's military right hand. A professional soldier who serves the empire loyally but pragmatically, without the fanaticis
• Colonel Aliana Tanaka — Ruthless Laconian intelligence colonel who hunts her targets with relentless, amoral efficiency. The primary antagonist of Leviathan Falls who will bu
• Teresa Duarte — Duarte's teenage daughter who grows up in the Laconian palace, gradually realizes her father is a monster, and allies with Amos to escape. A POV chara
• Carlos "Bull" de Baca — Tough Earther working for Fred Johnson as XO of the Behemoth. Broke his back during the Slow Zone crisis but kept fighting from a wheelchair, holding
• Praxidike Meng — Ganymede botanist and POV character who searches for his kidnapped daughter Mei with quiet, relentless determination. An ordinary man who refused to s
• Monica Stuart — Ambitious journalist and documentarian who follows the Rocinante crew through multiple crises, balancing personal ambition with genuine commitment to
• Adolphus Murtry — RCE security chief on Ilus who uses corporate authority and colonial violence to control the settlement. A professional killer with a badge, methodica
• Erich — Baltimore criminal boss and Amos's oldest friend from their shared brutal childhood. Helps Amos survive when the asteroid strikes devastate Earth, rep
• Basia Merton — Ganymede refugee turned Ilus colonist and POV character. A desperate father who makes terrible decisions for understandable reasons, embodying the hum
• Dimitri Havelock — Earthborn security officer who served as Miller's partner on Ceres and later as RCE security on Ilus. A perpetual outsider among Belters, competent bu
• Lieutenant Lopez — MCRN boarding party officer who brought the Canterbury survivors aboard the Donnager. Professional Martian soldier who did his duty in the moments bef
• Mei Meng — Prax's young daughter, kidnapped from Ganymede for protomolecule hybrid experiments. A small child used as a pawn by Mao's scientists, her rescue driv
• Arjun Avasarala — Avasarala's husband, a poet and academic whose gentle nature provides the emotional anchor that keeps the most powerful woman in the UN from losing he
• Shed Garvey — Canterbury medic who survived the ship's destruction only to die aboard the Rocinante when a railgun round took his head off. His sudden death establi
• Cyn — Marco Inaros's old friend and loyal lieutenant in the Free Navy. A true believer in Marco's cause who represents the tragedy of the Belt's legitimate
• Ade Nygaard — Canterbury XO and Holden's shipmate who dies when the Canterbury is destroyed by stealth ships. Her death is the inciting incident that sends Holden o
• Cara — Young girl on Laconia who discovers the alien repair drones can resurrect the dead when her brother Xan is killed. Her story in Strange Dogs introduce
• Xan — Cara's brother, killed in an accident and resurrected by Laconia's alien repair drones. He returns to life as something not quite human — functional b

Locations

• Rocinante — Corvette-class light frigate, originally the MCRN Tachi. Stolen during the Donnager's destruction and renamed by Holden. Fast, heavily armed for its s
• MCRN Donnager — Donnager-class battleship and flagship of the MCRN Jupiter fleet. Destroyed by her own crew rather than let her be captured by stealth ships during th
• Canterbury — Pur'n'Kleen ice hauler running water from Saturn's rings to the Belt. Her destruction by a stealth ship while responding to a distress call from the S
• Behemoth — Originally built as the Nauvoo, a Mormon generation ship for interstellar colonization. Captured by the OPA, converted into the battleship Behemoth, t
• Razorback — Racing yacht and the fastest civilian ship in the solar system. Built for one thing: acceleration. Used by Avasarala and Bobbie to escape from Mao's y
• Pella — MCRN Donnager-class battleship stolen by Marco Inaros and the Free Navy. His flagship during the asteroid bombardment of Earth. A stolen warship wield
• Tempest — Laconian Magnetar-class battlecruiser. The first warship built using Ring Builder technology in Laconia's orbital construction platforms. Protomolecul
• Ceres Station — The largest station in the Belt, spun up for gravity centuries ago. Home to millions of Belters living in tunnels carved through the dwarf planet. OPA
• Tycho Station — Massive mobile construction platform and the Belt's most sophisticated engineering facility. Built the Nauvoo. Fred Johnson's OPA headquarters. The cl
• Medina Station — The converted Behemoth, permanently stationed at the center of the Ring Space. Controls access to all 1,373 gates. Whoever holds Medina holds the cros
• Eros Station — Belt asteroid station and site of the protomolecule outbreak that killed over a hundred thousand people. Protogen deliberately infected the population
• Anderson Station — Small Belt station where Fred Johnson earned the name 'The Butcher of Anderson Station.' UN Marines under his command killed unarmed civilians who had
• Earth — Thirty billion people on a planet that can barely support them. Overpopulated, ecologically strained, running on basic income. Still the center of hum
• Mars — The Martian Congressional Republic — a military-industrial civilization built around a centuries-long terraforming project. The dream of a green Mars
• Luna — Earth's moon and a major UN government center. Lower gravity than Earth, domed cities, and the administrative infrastructure that helps run thirty bil
• Ganymede — Jupiter's largest moon and the 'breadbasket of the outer planets.' Massive agricultural domes feed millions across the Belt. The protomolecule hybrid
• Io — Jupiter's volcanic moon. Site of Jules-Pierre Mao's secret protomolecule laboratory where Dr. Strickland created the hybrid soldiers using kidnapped c
• Phoebe — Saturn's captured moon where the protomolecule was first discovered by Protogen researchers. A billion-year-old delivery system — an alien weapon aime
• Callisto — Jupiter's second-largest moon. Mining colony and shipyard facility in the Jovian system. Less politically significant than Ganymede but part of the Be
• Titan — Saturn's largest moon and a major MCRN military base. The Martian Navy's primary facility in the outer system, projecting Mars's power beyond the aste
• Ring Space — The hub — a sphere of space connecting 1,373 ring gates to different star systems. Built by the Ring Builders, governed by rules that humanity doesn't
• Ilus — First colony world beyond the Ring Gates, officially designated New Terra by the UN. Ancient Ring Builder ruins lie beneath the surface. Where Cibola
• Laconia — Colony world where High Consul Winston Duarte built an authoritarian empire using Ring Builder orbital shipyards. Named for ancient Sparta's disciplin
• The Belt — Not a place — a people and a political identity. The asteroid belt and outer system stations, home to millions of Belters whose bodies have adapted to
• Sol System — Earth's solar system — humanity's original home and the stage for the three-faction power struggle between Earth, Mars, and the Belt that defined huma

Items

• Protomolecule — Alien technology — a self-replicating, self-organizing set of molecular instructions sent to Earth's solar system 2.3 billion years ago by the Ring Bu
• Ring Gates — 1,373 portals connecting star systems through the Ring Space hub. Built by the Ring Builders using protomolecule technology. Each gate opens to a diff
• Protomolecule Hybrid — Human-protomolecule soldiers created by Jules-Pierre Mao's weapons program. The protomolecule uses human bodies as chassis, producing fast, tough, nea
• Epstein Drive — Fusion torch drive that made interplanetary travel practical. Named for Solomon Epstein, who died during the first test when he couldn't shut it off.
• The Juice — Acceleration drug cocktail that keeps humans conscious under high-G burns. Auto-injected from crash couches during maneuvers. The difference between s
• Goliath Power Armor — MCRN Goliath-class powered armor suit. Force-multiplying exoskeleton with integrated weapons, sealed atmosphere, mag boots, and enough firepower to tu
• Crash Couch — Gel-filled acceleration couches that distribute G-forces across the body during high-G burns. Built-in juice auto-injectors, medical monitors, and res
• Magnetar Weapon — Laconian superweapon mounted on Magnetar-class battlecruisers. Protomolecule-enhanced beam weapon that can destroy any conventional warship in a singl
• Sample Zero — The original protomolecule sample recovered from Phoebe Station by Protogen researchers. The seed of every horror and wonder that followed. Possession
• Hand Terminal — Universal personal device used throughout human space. Communication, data access, identification, financial transactions, and system interface — the

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