Marco is the charismatic and narcissistic leader of the Free Navy. He claims to fight for Belter liberation, but his military strategy relies heavily on mass casualties and public propaganda. He demands unquestioning loyalty from his followers and treats human lives as disposable assets in a larger strategic game.

James is the Earther captain of the Rocinante. He carries an immense burden of guilt over the casualties on Earth and strives to maintain his moral compass in a war zone. He attempts to counter wartime propaganda by broadcasting interviews with ordinary Belters, hoping to humanize the opposing sides.

Michio is a Belter captain who initially supports Marco Inaros but quickly grows disgusted by his cruel tactics. She operates her ship with a core crew made up of her polyamorous family. Her desire to genuinely help struggling Belt stations puts her at odds with Free Navy command.

Filip is the teenage son of Marco Inaros and Naomi Nagata. He serves on the Free Navy flagship and initially views the attacks on Earth with pride. His identity is entirely tied to his father's approval, but learning the truth about his mother's survival sparks severe internal conflict.

Chrisjen is the acting Secretary-General of the United Nations. She is a sharp-tongued, exhausted, and brilliant political operator managing the greatest crisis in Earth's history. She focuses on building a unified coalition to stop the Free Navy while privately grieving the devastation of her home.

Naomi is the Belter engineer of the Rocinante. She possesses brilliant technical skills and a deep understanding of Belter culture. She suffers immense psychological strain knowing her son fights for the Free Navy, forcing her to reconcile her heritage with her opposition to Marco's war.

Bobbie is a former Martian Marine known for her formidable combat abilities and strict discipline. With her home world's political structure collapsing, she finds a new sense of purpose serving aboard the Rocinante. She excels in high-gravity combat and tactical planning.

Fred is an older, established leader within the Outer Planets Alliance. He attempts to broker peace and build coalitions through traditional negotiation, but finds his methods increasingly obsolete against Marco's pure aggression. He pushes his physical limits to hold the fragile alliance together.

Amos is the chief mechanic of the Rocinante. He operates on a blunt, straightforward moral code focused entirely on protecting his chosen family. He ignores complex political ideologies in favor of practical survival and eliminating immediate threats.

Clarissa is a former enemy of the Rocinante crew who now lives under their protection. She works to earn her place on the ship and desperately seeks redemption for her past crimes. She uses personal mantras to separate her past actions from her current identity.

Anderson is the seasoned governor of Ceres Station and a veteran leader within the Outer Planets Alliance. He relies on negotiation and political leverage rather than pure violence. He finds himself outmaneuvered by the chaotic, absolute destruction favored by the Free Navy.

Alex is the skilled pilot of the Rocinante. He maintains an easygoing attitude that helps alleviate tension aboard the ship. As a former Martian navy pilot, he experiences profound sadness watching ships from his home world wage war against each other.

Praxidike is a civilian botanist living under occupation on Ganymede. He attempts to avoid political trouble to protect his family but feels compelled to act when he realizes his agricultural research could save starving populations.

Salis is a Belter construction technician working at the hub of the ring network. He feels a mixture of pride and worry about the military buildup, viewing the station as a defensible homeland for his people.

Namono is a civilian survivor navigating the apocalyptic aftermath of the asteroid strikes on Earth. She spends her days searching for basic supplies and avoiding thieves while trying to care for her family in a collapsing society.

Anna is Namono's wife, a civilian survivor of the asteroid attacks on Earth. Her injury forces her to rely on her family for survival in the ruined city. She maintains hope for human connection despite the devastation.

Nami is the young daughter of Anna and Namono. She experiences the trauma of the asteroid strikes firsthand, watching the debris of intercepted rocks fall through the atmosphere like shooting stars.

Rosenfeld is a senior member of the Free Navy's inner circle. She provides tactical updates and observes the shifting dynamics within the leadership, occasionally pointing out Marco's personal blind spots.

Nico is a financial leader within the Belter community. They analyze economic data and quickly realize that the Free Navy's strategies will lead to mass starvation across the Belt.

Jakulski is a technical officer who oversees arrivals at the hub of the ring network. He feels growing dread as mysterious military advisors arrive to establish new security bases.

Roberts is a maintenance technician who monitors station activity. She pays close attention to the tactical feeds and attempts to alert her supervisors when station defenses are threatened.

Vandercaust is a cynical technician who doubts the safety of his station. He experiences the arbitrary cruelty of Free Navy security when he is arrested and interrogated simply to serve as a scapegoat.

Sandra is an engineer working on Ceres. She forms a temporary but meaningful bond with Alex while the combined fleet prepares for its next offensive.

Karvonides is a botanist on Ganymede. She attempts to bypass Free Navy safety protocols to provide humanitarian aid, a decision that makes her a target for station security.

Karal is the security chief on Marco's flagship. She is tasked with managing Filip and revealing difficult truths to him regarding his mother's survival.

Cesar is one of James Holden's eight parents. Evacuated from Montana, he struggles with prejudice against Belters, sparking an important realization for his son about dehumanizing language.

Evans is the executive officer of the Connaught and one of Michio Pa's husbands. He supports her command decisions and provides honest feedback regarding their shifting alliances.

Oksana is one of Michio Pa's spouses. She provides emotional support and logistical counsel as their family executes a dangerous mutiny.

Josep is one of Michio Pa's husbands. He serves on the Connaught and offers steady reassurance to his wife during periods of extreme doubt and loss.

Nadia is one of Michio Pa's wives. She helps map logistics for their breakaway fleet and tends to her family's medical needs.

Admiral Souther is a military commander for the United Nations. He coordinates large-scale fleet actions and briefs political leadership on critical tactical opportunities.

Alexei is the Martian Prime Minister. He faces intense political pressure from his collapsing government while trying to secure vital data regarding missing ships.