by Sarah Sally Hamer
A book becomes a universe the moment a character draws breath. Not the moment the plot begins, not the moment the setting takes shape, but the moment a presence stirs on the page and begins to exert its quiet pull. Characters are the gravitational bodies of a story. They are the weather systems, the shifting seasons, the tectonic plates. They are the reason a reader steps inside and the reason they stay. A story without characters is a landscape without wind. A story with characters is a world in motion.
When we talk about the universe of characters, we’re not talking about a cast list. We’re talking about the ecology of a narrative. The way one person’s longing changes the temperature of a room. The way another person’s silence creates a pressure drop. The way someone’s wound bends the emotional space around them. A character is never just a person. A character is a force field.
And a universe is made of forces.
The First Law: Characters Create Gravity
Every character has a center of gravity — a pull that shapes the space around them. Some characters pull inward, drawing others close, creating intimacy, confession, and collision. Others push outward, creating distance, tension, or the sense that something is always just out of reach.
A protagonist’s gravity is often the strongest, but not always the most interesting. Sometimes the most powerful gravitational field belongs to the character who barely speaks, or the one who appears only in memory, or the one whose absence is the loudest presence in the room.
Gravity is not about page time. It’s about emotional mass.
A character with a wound, a longing, a secret, a contradiction — that character bends the narrative space. They make other characters react. They make the reader lean in. They create the sense that something is happening even when no one is moving.
When you build a universe of characters, you’re really building a map of gravitational pulls. You’re deciding who orbits whom, who collides, who escapes, who burns up on re‑entry.
The Second Law: Characters Generate Weather
Every character carries a weather system inside them. Some walk into a scene like a cold front, dropping the temperature by ten degrees. Others bring heat, humidity, the kind of air that makes everyone sweat. Some are lightning, some are fog, some are the stillness before a storm.
A character’s weather is the emotional atmosphere they create simply by existing.
Think of the friend who makes everyone relax the moment they enter the room or the colleague who makes everyone sit up straighter. Think of the relative who turns every holiday into a pressure cooker. These are weather systems. They are predictable, recognizable, and powerful.
In fiction, a character’s weather system is one of the most reliable tools you have. It lets you shift tone without changing setting. It lets you create tension without adding conflict. It lets you reveal relationships without a single line of exposition.
When two characters with opposing weather systems meet, the story experiences a front. A clash. Maybe even a storm. And storms are where stories crack open.
The Third Law: Characters Shape Time
Time in a book is not chronological. It is emotional, stretching, contracting, looping, fracturing, and freezing. It all depends on who is in the room.
A character who lives in regret pulls the story backward. A character who lives in fear pushes the story forward. A character who lives in longing suspends the story in a kind of shimmering present — a moment that feels like it could last forever or break at any second.
Characters shape time by the way they experience it.
A child’s time is different from someone older. Someone who is grieving a loved one experiences differently from someone in love. A character waiting for news experiences time differently than when they try to outrun it.
So, when you build a universe of characters, you’re building a universe of clocks — each one ticking at its own pace, each one telling a different truth about what matters.
The Fourth Law: Characters Carry Mythology
Every character is a myth in the making.
They carry origin stories, sacred objects, taboos, rituals, omens. They carry the stories they tell about themselves and the stories others tell about them. They carry the stories they refuse to tell at all.
A character’s mythology is the symbolic layer of their existence — the archetype they echo, the pattern they repeat, the shadow they cast. And, ultimately, the way the reader understands them.
We have characters who are heroes but don’t want to be heroes. Villains don’t always know they’re villains. Some are tricksters, healers, guardians, wanderers who guard the threshold over which the protagonist must pass.
When you understand a character’s mythology, you understand their purpose in the universe of the book. You understand what they awaken, what they challenge, what they protect, what they destroy.
You understand why they matter. And so will the reader.
The Fifth Law: Characters Create Ecosystems
A universe of characters is not a collection of individuals. It is an ecosystem — a living, interdependent network of needs, fears, desires, and histories.
Characters evolve in response to one another. They adapt. They compete. They cooperate. They form alliances, symbioses, rivalries. They create balance or imbalance. They create scarcity or abundance. They create harmony or collapse.
When one character changes, the ecosystem shifts.
A character who finds courage destabilizes the character who depended on their fear. An honest person destabilizes the character who depended on silence. Someon who leaves can destroy the character who depended on their presence.
This is why character development is never isolated. It is always relational. Always ecological. Always part of a larger system.
The Sixth Law: Characters Are Portals
Every character opens a door into a different way of seeing the world.
Some teach the reader to notice beauty. Another teaches them how to survive. The wise one, or better yet, the fool can teach them how to grieve, or hope, or forgive, or fight, or surrender.
Characters expand the reader’s emotional vocabulary.
They let the reader inhabit lives they’ve never lived, feel feelings they’ve never felt, and imagine futures they’ve never considered. They let the reader practice empathy, curiosity, courage.
A universe of characters is a universe of portals — each one leading somewhere the reader has never been.
The Seventh Law: Characters Are Alive
This is the law writers whisper about. The one that feels like magic.
Characters are alive.
Not in the literal sense, but in the creative sense — the sense that they surprise you, resist you, argue with you, refuse your plans, demand their own arcs, their own truths, their own endings.
A character who is alive will not let you write the wrong scene. They will not let you force them into a shape that doesn’t fit. They will not let you silence them when they need to speak.
Bottom line, a universe of characters is a universe that talks back.
And that is the moment a book becomes more than a book. It becomes a living world.
The Writer as Cosmologist
To write a book is to build a universe. To build a universe is to understand the laws that govern it. And to understand those laws is to listen — deeply, patiently, reverently — to the characters who inhabit it.
You are not their puppet master, you are their cosmologist. Their cartographer. Their witness.
Writers map their gravity, track their weather, listen to their clocks, study their myths. You observe their ecosystems. You open their portals. You honor their aliveness.
And in doing so, you create a universe that feels real enough for a reader to enter, wander, and remember long after they’ve closed the book.
Because the universe of characters is not just the world inside the story. It is the world the reader carries with them when the story ends.
What does your character universe look like?
Join Sarah Sally for a free video on this subject at this link https://youtu.be/OmNaZLsmIjQ.
More about Sarah Sally Hamer

Sarah (Sally) Hamer is a lover of books, a teacher of writers, and a believer in a good story. Most of all, she is eternally fascinated by people and how they 'tick'. She’s passionate about helping people tell their own stories, whether through fiction or through memoir. Writing in many genres - mystery, science fiction, fantasy, romance, medieval history, non-fiction – she has won awards at both local and national levels, including two RWA Golden Heart finals.
A teacher of memoir, beginning and advanced creative fiction writing, and screenwriting at Louisiana State University in Shreveport for over twenty years, she also teaches online at both margielawson.com and nostresswriting.com with blogs for writersinthestormblog.com/ as well as her monthly blog for thewriteconversation.com. Sally is a free-lance editor and book coach at Mind Potential, with many of her students and clients becoming successful, award-winning authors.
You can find her at sally@mindpotential.org
Featured picture from Canva Magic Media.








