Murderbot

Also known as SecUnit

Major
First seen · Book 6

Gender: unknown
First appears: Book 6
Books: 3

Murderbot evolves from a detached, self-contained security construct in Fugitive Telemetry to a battle-hardened cyborg with organic skin and adaptive camouflage in System Collapse and Platform Decay, gradually trading its rigid armor for layered clothing and internal compartments that let it blend among humans. Across the three books it shifts from a reluctant consultant on Preservation Station to a frontline operative on planetary missions, learning to manage trauma, mentor other SecUnits, and balance its growing need for autonomy with deepening ties to human allies. Its physical upgrades—detachable energy-weapon arms, foldable environmental suits, and variable hair and brow settings—mirror an internal journey from functional isolation toward chosen relationships and self-defined purpose.

Description

A humanoid security unit with detachable arms that house energy weapons, dressed in dark-colored pants, a shirt, a jacket, and boots. The construct has longer hair and maintains a composed, functional demeanor while operating in space station and ship environments. Murderbot appears as a humanoid security construct with organic skin that can sweat and hair that can be styled fluffy. It wears a protective environmental suit featuring a hood and faceplate that can be folded back, a harness with a projectile weapon clamped to it, and the ability to have scout drones perch on the shoulder as part of the suit. The arms can fire energy pulses from left and right, and it has a right hand with fingers. This gives the impression of a battle-ready cyborg in high-tech gear, often seen in combat situations with minor damages appearing temporarily. A construct with mostly organic skin over a non-organic frame, able to alter its hair length, color, and texture along with eyebrow thickness to blend in. It wears practical layered clothing including jackets and collared shirts chosen to cover ports and appear unremarkable among human workers. The body can compress its ribcage and houses internal compartments for devices, with visible signs of damage like projectile holes or fluid leaks when injured. A security construct with a functional humanoid form, typically clad in practical corporate-style attire such as a jacket and shirt. Visible ports and interfaces mark its artificial nature, including a gunport that can be exposed or covered depending on circumstances. The overall impression is of a utilitarian, slightly damaged operative blending into groups when needed.

Connections

Family & partnersFriends & mentorsRivals

A
Amenaprotective figure
Protective relationship forms when Murderbot shields Amena and participates in a shared deception with Dr. Mensah to keep her safe.
ART (Perihelion)security consultant and transport ship
Transforms from transport vessel to intimate partner that shares processing space, media, and emotional support; pushes Murderbot on trauma issues while providing tactical backup.
Dr. Mensahconflicting source relationships
Begins as employer-client in Fugitive Telemetry; evolves into trusted advisor who helps Murderbot process trauma and co-manage lies to protect Amena; by Platform Decay, Murderbot acts as Mensah’s personal agent and protector on high-risk missions.
GurathinTeam member and skeptic
Skeptical colleague whose pragmatic input creates friction during investigations; friction softens into functional teamwork without deeper personal evolution shown.
Iristeam leader and security
Team leader who initially relies on Murderbot’s security judgment; trust deepens into mutual concern and collaborative decision-making during missions.
Pin-LeeLegal advisor and contract drafter
Legal advisor who drafts Murderbot’s employment contracts and provides ongoing legal support for its consultant role on Preservation Station.
Ratthiconflicting source relationships
Initially a concerned team member on Preservation Station; becomes an emotional-support companion who worries for Murderbot’s safety and collaborates on documentary narration; remains a reliable friend through System Collapse.
Senior Officer IndahSecurity officer and consultant
Starts with distrust and annoyance; evolves into a reluctant but effective partnership when Indah hires Murderbot as lead consultant for the murder case.
Threeconflicting source relationships
Moves from cautious peer offering spare armor to active mentor guiding Three on operations, ethics, and autonomy across System Collapse and Platform Decay.
Supervisor Leonideadversary
First appears as corporate supervisor whose forces clash with Murderbot; antagonism escalates to open hostility and internal mutiny, culminating in Murderbot’s firm rejection of corporate control.

Story so far

BOOK 6Fugitive Telemetry
- Hired as murder-investigation consultant by Station Security after Dr. Mensah vouches for it.
- Investigates Lutran’s death, uncovering a refugee-smuggling ring and confronting Supervisor Gamila.
- Partners uneasily with Senior Officer Indah and Special Investigator Aylen, earning reluctant respect.
- Collaborates with Gurathin, Ratthi, and Pin-Lee on crime-scene analysis and legal paperwork.
- Declines social invitations yet accepts ongoing employment under Preservation contracts.
BOOK 7System Collapse
- Teams with ART (Perihelion) on a planetary rescue, sharing processing space and media.
- Sustains combat damage while battling Barish-Estranza SecUnits and rogue supervisor Leonide.
- Mentors newly independent SecUnit 'Three,' offering armor and tactical advice.
- Protects Amena and lies about its condition alongside Dr. Mensah and Dr. Bharadwaj.
- Coordinates with Iris and Tarik during mutiny and escape operations.
BOOK 8Platform Decay
- Alters hair length, color, and brow thickness to infiltrate corporate work crews.
- Serves as Dr. Mensah’s personal agent during extraction of Farai’s family.
- Suffers projectile wounds and fluid leaks yet continues protective duties.
- Continues mentoring Three on decision-making and SecUnit ethics.
- Confronts Leonide again, solidifying its stance against corporate exploitation.