Claire Littleton is one of the middle section survivors of Oceanic Flight 815. She is Jack Shephard's half-sister, although neither of them knows this. She is the mother of Aaron Littleton who was born on the island soon after the crash, and has done her best to raise Aaron as best she can. During her time on the Island, she has entered into a relationship with fellow survivor, Charlie Pace and is the only survivor that has escaped from The Others by themself.
Before the crash
Born and raised in Australia, Claire Littleton was raised by a single mother, Carole Littleton, after an affair with her father Christian Shephard. He visited her many times as a baby but stopped visiting because, according to him, her aunt Lindsey hated him, and Carole couldn't cope with him having another family. As an adolescent, Claire was rebellious to her mother, dressed in a gothic style and worked in a piercing/tattoo parlor. At a young age, Claire got into a car accident during a heated argument with her mother, where she was forced off the road by a truck and crashed. She received light injuries (i.e. broken arm and cut above her eye), but her mother had suffered severe brain hemorrhaging and was in a coma. Her father came to Australia to convince her to remove her mother's life support, in order to put Carole out of her misery. She refused to do so and demanded that he leave her alone. She claimed that she didn't even know his name, nor did she want to. ("Par Avion") Claire's boyfriend, Thomas, would claim that she had "daddy abandonment" issues. ("Raised by Another")
Sometime later, while working at the Fish & Fry restaurant at $5 an hour, Claire's path seemed to be dead end and predictable. However, her life would change when she and her boyfriend Thomas realized they were to become parents. Though Claire had her doubts, Thomas convinced her that a baby could be "the best thing ever" and would give their lives hope once more. However, Thomas came to the decision that being a young father was too much to handle, and he left Claire. Now on her own, Claire decided to give her baby up for adoption when it was born.
Claire's friend Rachel took her to see Richard Malkin, who claimed to be a psychic. As Claire was interested in astrology and horoscopes, Rachel believed it would cheer her up. However, when reading her palm, Malkin saw something terrible, and insisted that Claire had to raise the child herself as "danger surrounded this baby!" Claire, however, did not believe him, and told him to leave her alone.
Meeting with her child's adoptive parents, Arlene and Joseph Stewart, Claire prepared to sign away rights to her unborn child. She requested that the Stewarts sing the lullaby "Catch a Falling Star", as it was the song her father used to sing to her. However, as Claire is about to sign, two pens she tried to use did not work, and Claire's doubts at relinquishing her child (due to Malkin's warning) surfaced, with her running out of the room.
Claire returned to Richard Malkin, who told her that her baby would be safe if she gave it to a couple in Los Angeles, who are "good people". Giving her a ticket for Oceanic Flight 815, Claire left for what she believed was a new life in America. ("Raised by Another")
Right before leaving for Los Angeles, she visited her mother at the hospital. She told her mother that she was pregnant and that she was going to give the child up for adoption. She was astonished that her mother was able to raise her without any assistance. She then sobbed over her mother and told her that she was sorry for being so terrible to her, and for saying that she hated her and that she wish she was dead when they were in the car, right before it crashed. ("Par Avion")
On the Island
Surviving the plane crash, Claire immediately worried about the state of her baby. Jack saved her as a wing from the plane almost crashed on her and Hurley, and Claire was relieved to later feel her baby kick, after it hadn't for a worrying amount of time. ("Pilot, Part 1")
Much to her dismay, no other survivors seemed to feel comfortable around her. She was lonely for the first couple days after the crash, until Charlie approached her, helping her with difficult tasks and keeping her company. Claire soon became good friends with Charlie, and they began to spend more time together. ("White Rabbit")
Later, after she collapsed from heat stroke and exhaustion, Charlie convinced Claire to move her belongings to the caves, so she would be safer from the beating sun and various animals. While there, Claire began to have a series of dreams and encounters that led her to believe that someone was out to hurt her and her baby. Juliet would later claim that these incidents were Ethan sneakily injecting Claire with the pregnancy-protection serum Juliet had developed. ("One of Us")
Unfortunately, no one except Charlie believed her about these visions, and she decided to move back to the beach, where she thought she would be safer.
On her way back, she started to have contractions. Charlie went for help, and he encountered Ethan Rom, whom he told to get Jack. Charlie returned to Claire, and he kept her calm and relaxed while they waited. Once the contractions stopped, however, they were accosted by Ethan in the jungle. He struggled with Charlie, then knocked the pair unconscious and dragged them both into the jungle. ("Raised by Another")
Jack, Locke, Kate, and Boone set out to rescue them. The group followed a makeshift trail Charlie left behind, and soon began to gain on Ethan. At some point, Claire regained consciousness, and let out a series of screams that drew Jack in her direction. Unfortunately, in order to stop their pursuit, Ethan tied Charlie up and hung him from a tree by his neck. They kept Claire and disappeared into the jungle. ("All the Best Cowboys Have Daddy Issues")
She was not seen or heard of for almost two weeks after that. Charlie, who was recovered and saved by Jack, distanced himself temporarily from the others, and was crushed by her loss. Then, while searching for Vincent, Locke and Boone were surprised by Claire wandering the jungle, beaten and bruised.
When they brought her back to the caves, she had no recollection of any of the events since the crash. Charlie helped her to regain bits and pieces of her lost memories, and they re-formed her bond. However, she was not able to offer any information regarding what happened to her during the two weeks she was missing.
Shortly after her return, Ethan appeared in the jungle, beat Jin, and choked Charlie, demanding that Claire be returned, or else he would start killing the survivors. Everyone rallied to stop him, but somehow, Scott was taken from the camp and brutally murdered in the night. This prompted the survivors to set a trap.
Not long after, Claire gave birth to a son, whom she named Aaron. Claire's bond with Charlie was reinforced, when he rescued Aaron from Danielle Rousseau, who kidnapped the baby believing she could use him in an exchange with the Others for her own daughter, Alex.
Safely reunited with Aaron, Claire and Charlie moved in together back on the beach. They lived a happy existence, playing father and mother to the baby, until Claire began to experience terrifying visions of Ethan performing various medical procedures on her while she was pregnant.
With the help of Libby, she realized that these visions were actually her memories, which were slowly returning to her. Her mind had blocked them out to protect her, and she discovered what happened in the two weeks that she was kidnapped.
She discovered that she was taken to the Staff, another DHARMA station on the Island. It appeared to be a medical station of some kind, and, while there, Claire was drugged, and given injections of some kind of vaccination. The drugs had a profound effect on Claire, who began to believe that Ethan and the Others should actually raise her baby.
Fortunately for Claire, one of the Others, named Alex, saved her. Alex knew of the Other's plans - to cut the baby out of Claire, without regard for the mother's safety - and was determined to stop it. However, Claire did not believe Alex's words, and fought so hard that Alex had to use chloroform to make Claire unconscious. Alex left her out in the jungle, and, when she awoke, she shouted for Ethan. Before he could reach her, however, Danielle Rousseau found her, and, knowing what would happen if Claire went back to the Others, knocked her out with the blunt end of her rifle. In this proceeding struggle, Claire scratched Danielle badly, on the left arm Rousseau then carried Claire back to camp, to be picked up by Locke and Boone. ("Maternity Leave")
Back at the camp, Claire discovered that Charlie had once been an addict. This caused her to be wary of him while he was around the baby, even though he had been clean since the crash. The last straw for Claire was when Locke 'revealed' that he was still using the heroin found in the beechcraft.This, coupled with the fact that Charlie was becoming increasingly desperate to baptize Aaron. He had a series of visions which convinced him that Aaron needed to be baptized. Unfortunately, Charlie's erratic behavior caused Claire to make him move out. The deal was sealed when Charlie brought Aaron down to the ocean without her permission, in an attempt to have him baptized. Claire was shocked, and cut connections to him. However, she did decide to follow Charlie's advice, and requests that Eko baptize her and her son, so that if anything were to happen, they would be together in heaven. ("Fire + Water")
Later, as Claire began to piece together the missing parts of her memory, she and Kate headed into jungle to find the station that Claire had been held in. Rousseau met and accompanied them; she had just entered the camp once again to warn Claire about Aaron's sickness, and tagged along on the mission, to find medicine to help Aaron. However, they did not find any medicine; the whole facility was empty. But, the location acted as a trigger for Claire, who remembered fully what happened. She apologized to Danielle for scratching her, and for believing that she was somehow involved in the kidnapping, recognizing that Rousseau had actually helped save her life.("Maternity Leave")
Claire remained wary of Charlie for a while, but eventually, she began to re-evaluate her relationship with him. He gave her plenty of space, and, after the supply drop, he found and gave her a large supply of the vaccine, which helped to put her mind at rest about the sickness that Ethan and Rousseau had mentioned. She held his hand at the burial of Ana-Lucia and Libby, which showed how their relationship had been repaired. After the events of the discharge, Claire kissed Charlie in front of the camp fire.("Live Together, Die Alone, Part 2")
One day, Desmond ominously attempted to persuade Claire to move down by the beach, stating that her roof had problems and he would fix them. When Claire decided not to move, Desmond started to construct a large lightning rod next to her shelter. The other survivors were perplexed, but then, a flash rainstorm came, and the rod diverted a bolt of lightning that stuck very close to Claire's tent. ("Every Man for Himself")
Desmond rescues Claire again when she is caught in an undertow by bringing her ashore and resuscitating her. Charlie confronts Desmond about his continual rescuing of Claire, but Desmond reveals that it is actually Charlie that he had saved, and not Claire. ("Flashes Before Your Eyes")
Claire was seen a few days later, sitting with Charlie as he recounted his adventure with the DHARMA van. It seems as if Charlie was no longer obsessing about his imminent death, and the two seemed to have a good time. ("Tricia Tanaka Is Dead")
Later, Claire conceived of the idea to use migrating gulls to send a message to the outside world. Desmond stopped Charlie from participating in the capture of any gulls (causing an argument between Charlie and Claire) and then interfered with Claire's attempt to catch a gull with Jin and Sun. Claire, confused by Desmond's behavior, followed him to the cove and watched him hurry over to a gull and catch it with little effort. Confronting him, she eventually learned about his newfound precognitive abilities and about his premonitions of Charlie's death. Desmond handed over the captured gull and Claire composed a rescue note. Claire and Charlie reconciled and tightened their relationship. They then released the seagull with the note attached, and Claire confessed that she has not yet "given up" on Charlie. ("Par Avion")
When Sawyer wanted to make amend and fit in with the rest of the survivors, his main target was to befriend and gain Claire's trust. Claire was shocked when Sawyer gave Aaron a blanket but she was also appreciative. Claire eventually let Sawyer hold Aaron after she thought Sawyer was capable and trustworthy. ("Left Behind")
The next day, Claire starts to feel sick. Charlie looks after Aaron hoping that Claire would get some rest. A few hours later while the survivors are having a "meeting", Claire stumbles into it seeing as she missed the arrival of Jack, Kate, Sayid and Juliet. ("One of Us")
Charlie is angry at the fact that Claire didn't rest as much as he hoped. Claire looks worse then she did before so Sawyer offers her some aspirin. She collapses but Charlie catches her in time, but suddenly blood starts to poor from Claire's mouth. Juliet claims that she can help Claire, as she reveals to Kate that she (Juliet) is the one who made Claire sick. This is later revealed to be a ruse in the flashback scene where Ben rehearses Juliet's role as a mole among the survivors. During the the time Claire was in The Staff, she was implanted with a device that could be triggered to induce the exact medical trauma she experienced. The whole point was to help the survivors trust Juliet as the savior of Claire. ("One of Us")
- All Claire-Centric episodes have followed Sayid-Centric episodes.
- Claire's birthday is October 27 (The same day the Red Sox won the World Series).
- Claire's accident in the water is the way that Joanna died. They were both caught in some sort of riptide and swept out to sea.
- Claire believes in astrology.
- Claire is of French and Latin origin, and its meaning is "illustrious, clear, or bright". French form of Clara.
- Claire has a model airplane on her bedside table.  ("Raised by Another")
- For fan theories about these unanswered questions, see: Claire Littleton/Theories
- Why did she lose her memory of being taken by Ethan? Was it a psychological response to a traumatic experience, a result of Rousseau knocking her out, the drugs Ethan gave her, or a similar form of brainwashing as used on Karl in Room 23? ("Maternity Leave")
- Why hasn't she told anyone (including Kate who was also at the Staff with her) about her reconstructed memories, particularly if she wants to protect Aaron from future kidnappings or harm from the Others? Her motive is unclear, particularly when telling everyone else might have spared many people a lot of harm.