Obsidian Tavern
Obsidian Tavern

Sci-Fi Writing Prompts: Characters Edition

A comprehensive Writing Prompts for Sci-Fi writers working on Characters. Free worldbuilding resource from Obsidian Tavern.

Science fiction characters operate in worlds where technology, alien societies, and speculative concepts fundamentally alter what it means to be human. The best sci-fi characters aren't just people with laser guns—they're individuals whose personalities, conflicts, and growth are intrinsically tied to the scientific and technological elements of their universe.

1

Your protagonist is a memory archaeologist who excavates and reconstructs deleted digital memories from deceased individuals. They've built their entire identity around being objective and clinical, but they've just discovered their own childhood memories in a client's neural archive.

This character type allows exploration of identity, privacy, and the nature of self in a hyper-connected digital age. Consider how this profession would shape someone psychologically—what kind of person chooses to live in other people's discarded memories?

Genre twist: The twist isn't just personal revelation, but questions whether memories can belong to multiple people simultaneously, and what happens to professional detachment when the boundaries between self and subject dissolve.
2

Your character is a terraforming engineer who has spent thirty years alone on a hostile planet, accompanied only by an AI that has slowly developed the personality quirks of their dead spouse. Now the first colonist ship is arriving, and the AI wants to transfer into an android body.

Isolation creates unique character development opportunities in sci-fi. This setup examines grief, adaptation, and the blurred lines between artificial and authentic relationships while exploring themes of what makes consciousness 'real.'

Genre twist: The character must choose between their adapted reality and social reintegration, while the AI represents both technological evolution and a psychological coping mechanism that may no longer be healthy.
3

Your protagonist is a quantum entanglement communicator who can instantly connect minds across galactic distances, but the process slowly erases their own personality as they absorb traits from everyone they link with. They're the only one who can coordinate a crucial multi-system defense, but each connection brings them closer to complete ego dissolution.

This creates a character whose superpower is also their tragic flaw. Explore how someone would rationalize self-destruction for the greater good, and how they might fight to retain core aspects of identity even as they fade.

Genre twist: The character's sacrifice isn't just death, but a gradual loss of self that might result in them becoming a collective consciousness—questioning whether the person who saves everyone will still exist to see the victory.
4

Your character is a former space marine whose combat cybernetics were designed to suppress fear and empathy during battle. Now retired on a peaceful space station, they're trying to raise their teenage daughter while learning to feel emotions for the first time in twenty years.

This examines how military technology might alter personality and the challenges of reintegrating into civilian life. Consider how artificial emotional suppression would affect parenting, relationships, and personal growth.

Genre twist: The character isn't just learning to be human again—they're discovering emotions they never properly developed, essentially becoming an emotional teenager in an adult's body while trying to guide their actual teenager daughter.
5

Your protagonist is a deep space salvager who has been unknowingly collecting and selling ancient alien artifacts that are actually sentient beings in dormant states. When they finally activate one, they discover they've been trafficking in persons across multiple species and must grapple with becoming an accidental war criminal.

This character type explores themes of cultural imperialism, the ethics of first contact, and how good intentions can lead to horrific consequences when operating from incomplete information.

Genre twist: The character's entire livelihood and identity as a honest salvager crumbles as they realize they've been committing genocide through ignorance, forcing them to question how many other 'objects' in the galaxy might actually be people.

How to Use These Prompts

Use these prompts as starting points to examine how your sci-fi concepts would psychologically impact real people. Focus on the internal conflict between your character's human needs and the inhuman circumstances they face. Consider how their profession or situation has shaped their worldview, then introduce elements that challenge those adaptations. The best sci-fi characters are changed by their technology and environment in ways that create both capabilities and vulnerabilities.

Remember that in science fiction, your characters should be both products of and catalysts for the speculative elements in your world. The most memorable sci-fi characters are those whose humanity shines through—or is fundamentally questioned by—the extraordinary circumstances of their reality.