The Firefly 'Verse' —
A Universe from the Mind of rondori
Takes place in the year 2517, on several planets and moons. These celestial bodies are within one star system, Serenity's mode of propulsion is a "gravity-drive". The film Serenity makes clear that all the planets and moons are in one large system, there is no faster-than-light travel in this universe.
The characters occasionally refer to "Earth-that-was" and in the film, it is established that long before the events in the series a large population had emigrated from Earth to a new star system in generation ships: "Earth-that-was could no longer sustain our numbers, we were so many." The emigrants established themselves in this new star system, with "dozens of planets and hundreds of moons." Many of these were terraformed, a process in which a planet or moon is altered to resemble Earth. The terraforming process was only the first step in making a planet habitable, however, and the outlying settlements often did not receive any further support in the construction of their civilizations. This resulted in many of the border planets and moons having forbidding, dry environments.
The Alliance governs the star system through an organization of "core" planets, following its success in forcibly unifying all of the colonies under a single government. Two main planets, one predominantly Western in culture, the other pan-Asian, are the seat of government.
The central planets are firmly under Alliance control, but the outlying planets and moons resemble the 19th century American West, with little governmental authority. Settlers and refugees on the outlying worlds ("out in the black" or "heading for the black") have relative freedom from the central government, but lack the amenities of the high-tech civilization that exist on the inner worlds. In addition, the outlying areas of space are inhabited by the Reavers, a cannibalistic group of nomadic humans that have become savage and animalistic due to a corporate/government experiment gone horribly wrong.
The captain of the crew of Serenity is Malcolm "Mal" Reynolds (Nathan Fillion) and his first mate Zoe Washburne (Gina Torres) are veteran "Browncoats" of the Unification War, a failed attempt by the outlying worlds to resist the Alliance's assertion of control. Mal bought the spaceship Serenity in order to continue living beyond Alliance control. Much of the crew's work consists of cargo runs or smuggling.
One of the main story arcs is that of River Tam (Summer Glau) and her brother Simon (Sean Maher). River was a child prodigy, whose brain was subjected to experiments. As a result, she displays schizophrenia and often hears voices. It is later revealed that she is a "reader", one who possesses psychic abilities. Simon gave up a highly successful career as a trauma surgeon to rescue her from the Alliance and as a result of this rescue they are both wanted fugitives.
Malcolm "Mal" Reynolds is the owner of Serenity and former Independent sergeant in the pivotal Battle of Serenity Valley. Very little is known about the enigmatic Captain; the little he reveals about his past life betrays nothing of his character (a mystery of its own). Malcolm reveals that he grew up on a ranch, and was raised by his mother and the ranch hands before the Unification War, in which he and Zoe fought for the Independent Army, or "Browncoats", as a platoon sergeant in the 57th Overlanders. He is an efficient leader and is skilled with guns as well as in hand-to-hand combat. Mal's character is full of contradictions. He is constantly fighting his demons, and his true self remains something of a mystery.
Zoe Alleyne Washburne (Gina Torres) is second-in-command onboard Serenity, a loyal wartime friend of Captain Reynolds, and the wife of Wash. Described by her husband as a "warrior woman", she has great knowledge of combat. Her past is a mystery; the only thing known is that she was born and raised on a ship and served under Mal during the war as a corporal. She demonstrates an almost unconditional loyalty to Mal, the only exception noted being her marriage to Wash, which the captain claims to have tried to prevent.
Hoban "Wash" Washburne (Alan Tudyk) is Serenity's pilot and Zoe's husband. Wash expresses jealousy over his wife's "war buddy" relationship and unconditional support of their captain, While more of Wash's past is disclosed than most other characters, his background is still sparse: he joined pilot training just to see the stars, which were invisible from the surface of his polluted homeworld, and he joined Serenity despite being highly sought after by other ships. He is very light-hearted and tends to make amusing comments, despite the severity of any situation. He died during the events described during the movie 'Serenity'.
Inara Serra (Morena Baccarin) is a Companion, which is the 26th century equivalent of a courtesan or oiran. Like her Renaissance counterparts, Inara enjoys high social standing. Her presence confers a degree of legitimacy and social acceptance the crew of Serenity would not have without her on board. She and Mal have a strained relationship, with unspoken romantic tension playing a significant part in several episodes, as well as in the movie. Inara arguably represents Mal's heart, and Mal is a noticeably darker character when Inara is absent . She rents one of the ship's two small shuttles.
Jayne Cobb (Adam Baldwin) is hired muscle. He and Mal met on opposite sides of a rivalry; Mal, while held at gunpoint, offered Jayne his own bunk and a higher cut than his current employer, so he turned coat and shot his then-partners. He is someone who can be depended on in a fight. He tends to act like a "lummox" who thinks he is the smartest person in space, but occasional hints of intelligence peek through this façade, giving the impression that he acts dumber than he is. Even though he is a macho character, he has shown a particularly intense fear of Reavers, more so than the rest of the crew. Despite his amoral mercenary persona, he sends a significant portion of his income to his mother.
Kaywinnit Lee "Kaylee" Frye (Jewel Staite) is the ship's mechanic. In the episode "Out of Gas", it is established that she has no formal training, but keeps Serenity running with an intuitive gift for the workings of mechanical equipment. Jewel Staite explains Kaylee's character as being wholesome, sweet, and "completely genuine in that sweetness", adding "She loves being on that ship. She loves all of those people. And she's the only one who loves all of them incredibly genuinely." She has a crush on Dr. Simon Tam. Kaylee's character is the soul of the ship: if Kaylee believes something, it is true.
Dr. Simon Tam (Sean Maher) is a medical researcher and trauma surgeon of the first caliber (top 3% in his class at a top core planet institution), who is on the run after breaking his sister River out of a government research facility. His bumbling attempts at a relationship with Kaylee are a recurring subplot and at every turn he seems to find a way to unwittingly foil his own romantic desires. His life is defined by caring for his sister.
River Tam (Summer Glau) was smuggled onto the ship by her brother. River was a child prodigy of unparalleled genius, but she was experimented upon at the hands of Alliance doctors, leaving her delusional, erratic, and at times violent. Her personal journey of self-discovery is a running theme throughout the series and the movie. River is constantly at war with her own demons. She sees and hears things that others do not, and experiences waking dreams of her memories of the Alliance "academy" experiments. Opinions of her vary among the crew: some value her, Jayne fears her, and the rest just want her to stay out of trouble.
Derrial Book (Ron Glass) is a Shepherd (equivalent to a priest, minister, or pastor). Although presented as a devout Christian man, Book demonstrates a depth of knowledge about the activities of criminals and corrupt police . He is also proficient in hand-to-hand combat and the use of firearms. When questioned on his non-Biblical intentions during the rescue in "War Stories", Book replies somewhat ironically that while the Bible is quite specific about killing, it's "somewhat fuzzier on the subject of kneecaps." In "Safe," he was shown to have sufficient status in the Alliance to receive medical treatment from the military without questions asked. Book represents Mal's guide, conscience, and lost spirituality. He also died during the events described during the movie 'Serenity'.
{Credits to Wikipedia}
(Using the characters and setting of the series "Firefly" and the movie "Serenity") The story of a beautiful high class call girl(companion) who has to change her profession to sex therapist after the events in the movie 'Serenity'