Claire Novak is the daughter of Jimmy Novak, Castiel's vessel. Jimmy offers himself over to Castiel, after his wife Amelia threatens to take Claire to her mother's if he does not get help. After Jimmy says "yes" to Castiel, Claire comes outside and says "Daddy?" Castiel replies "I am not your father" to her.
After almost a year of Amelia looking for Jimmy and thinking he was dead, he returns home. Amelia lets Jimmy talk to Claire and have dinner with them.
During their meal, their neighbor, Rodger stops over. He reveals himself as a demon to Jimmy, but Claire's mother, Amelia does not believe Jimmy. Jimmy puts Claire and Amelia in the pantry to keep them safe, but Amelia holds Jimmy back, so Claire can escape. Claire does, and when Jimmy and Amelia come out they see that Rodger is holding a knife to her throat. He makes the remark "I told you I'd gut the bitch." Claire calls out for her father as another demon attacks him.
Dean comes up behind Rodger and kills the demon with Ruby's Knife. This frees Claire and allows her to escape with her father. Claire, Jimmy, Amelia, Sam and Dean meet up outside the house and drive away in the impala.
Once they stop, Jimmy tells Amelia to take Claire to "Carl and Sally's" house. Amelia agrees and Dean, Sam and Jimmy drive off. When they do, Claire asks "Why is he leaving again?" Amelia slaps her and flashes black, demon eyes. She says "Cause it's just not my day, is it? You little bitch."
Jimmy, as instructed, comes to the warehouse where the demon possessing Amelia has Claire tied to a chair. Two demons bring Sam and Dean did. Amelia then shoots Jimmy and instructs one of the demons to "waste little, orphan Annie".
However, as the demon swings a pole at her, Claire suddenly wakes up, grabs it and smites the demon before burning free of her ropes. A horrified Jimmy realizes that Castiel has returned and has gained Claire's permission to use her as a vessel. Using Claire, Castiel is able to smite a second demon fighting Dean and watches as Sam drinks demon blood and exorcises Amelia.
Castiel tells Jimmy that he intends to use Claire as his vessel, and that Jimmy's work is done. But Jimmy convinces him to use him instead to protect Claire. Castiel leaves Claire and once again, uses Jimmy as a vessel, leaving Claire with her mother and no father again.
In The Things We Left Behind, Claire is shown as a problematic and erratic kid who keeps running from Group Homes. In one of these times she encounters Castiel, who poses as her father. After he helps her escape, Claire ditches Castiel to meet up with her surrogate father, Randy. However, Randy was in debt to a loan shark, Salinger, and when Salinger came to collect, Randy willingly gave up Claire to the loan shark, who attempted to force himself on her. Castiel then arrived and rescued her. Unfortunately the loan shark's gang regroups and trap Dean, in which the others are forced to escape. When they come back into Randy's house, they find Dean covered in blood, standing over the thugs' bodies, including Randy, to Claire's horror.
In The Hunter Games, Claire is found by Castiel, who still tries to connect with her but she refuses, blaming Dean for Randy's death, as well as refusing to acknowledge that he betrayed her to save himself. She later meets a couple whom she confides her troubles to. When Dean calls her at Castiel's suggestion, the couple convince her to lure Dean into a trap so she could have revenge for Randy's death. At the end Claire changed her mind about Dean getting killed and warns him, in which he overpowers the couple, though rather than give into the Mark of Cain, lets them go. Claire then started going her own way, during which Castiel arrives in his car, having heard her informal prayer. Claire tells him that she has to make a new life for herself alone but promises to keep in touch.
During Angel Heart, in the months after leaving her group home, Claire begins a search for her missing mother. Having received postcards from Amelia and her things, including her diary after her final disappearance, Claire is able to track her mother to Tulsa, Oklahoma where she was to meet a man named Ronnie Cartwright. Ronnie claims not to know Amelia, but draws Claire's suspicion when he refers to her as Amelia Novak despite Claire not telling him her last name. Ronnie accidentally knocks Claire out and calls an ambulance which takes her to the hospital. As Castiel is in her emergency contacts on her cell phone, the hospital calls him and he calls in Sam and Dean to help him deal with Claire.
When Sam, Dean and Castiel arrive, Claire is not happy to see them, but tells them of her search before fleeing the hospital when they leave the room. However, she made the mistake of telling them where she was staying as well as checking in under her own name and finds Sam waiting for her while Dean and Castiel interrogate Ronnie. While Claire initially rebuffs Sam's efforts to help her, she finally agrees after he offers to teach her how to hack her mother's credit card records to look for clues. Claire is intrigued by how easy it is and insists on going with Dean and Castiel to investigate Ronnie's murder. When they return to the motel, Sam is able to figure out that the man Amelia was supposed to meet, Peter Holloway, has a farm that Amelia had been spending time around. Sam and Castiel go to investigate, but leave Claire and Dean behind for her own safety and because the Mark of Cain is starting to affect Dean worse.
Things between Dean and Claire are awkward at first, so Dean takes Claire to play mini-golf which they bond over. When Claire puts her putter in the last hole to demonstrate how the ball gets taken there, Dean realizes that the angel who has her mother used an angel sword instead of an angel blade and he and Claire research angels. Claire finds information on the Grigori, a class of angels that preys on humanity and when they are unable to reach Sam or Castiel, expects Dean to leave her behind while he goes to rescue them. However, Dean instead gives her a gun and instructions on how to use it and takes her with him.
Arriving at the farm, Dean and Claire investigate the barn and Claire is finally, tearfully, reunited with her mother. As Claire tries to help her weak mother out of the barn, Tamiel, the angel that had been feeding off of her arrives and tells Claire that Amelia is beyond saving. Claire tries to kill Tamiel with her gun, but he proves immune and tries to kill her with his sword. Amelia sacrifices herself to save Claire, leaving her devastated. Sam, Dean and Castiel engage Tamiel who proves stronger than all of them so Claire kills him with his own sword before embracing her mother's body.
The next day, Sam and Dean decide to send Claire to Jody Mills until she can get on her feet. Claire finally forgives Castiel for his role in her father's death, hugging him goodbye and asking Dean to look after him. She also keeps a stuffed animal Castiel got her for her 18th birthday. Before saying goodbye, Dean gives her a copy of Caddyshack and a lore book, having noticed her keeping Tamiel's sword. He advises her against becoming a hunter, telling her how dangerous it is and that she got her revenge when she killed Tamiel. Claire jokingly tells him he's pretty old when he tells her about how hunters don't live long and leaves in a taxi.
In Don't You Forget About Me, Claire attacks a young couple making out at night, holding her angel sword to the boy's throat and demanding to know what he is. She later calls Dean for help as she believes there are monsters in Sioux Falls and Jody refuses to believe her.
At dinner, Claire explains that three people have disappeared and other people are reporting animals they have never seen before and things stalking their front yards. Alex tells the Winchesters that Claire has previously thought there were monsters when there weren't and Jody tells them the only reason she's not in jail for all the assaults she's committed is Jody is the sheriff. Annoyed with Alex, Claire reveals that Alex and Henry are planning to sneak off to Jody's cabin to have sex to everyone's embarrassment.
Jody privately tells Dean that the boy Claire assaulted is hell-bent on pressing charges and though Claire has started college, she doesn't go to classes in weeks, has no friends and instead spends all of her time looking for cases and reading lore. After Jody expresses worry that Claire is burying herself in hunting as she feels she has nothing else, Sam talks to her and Claire admits she feels like she's not really apart of Jody and Alex's family since she arrived so much later. Claire suggests that she leave and become a full-time hunter, but Sam tells her that monsters will always be out there, but a chance at a normal life won't be.
The next day, after Mr. Phelps' body is found hanging from the school flagpole, Claire asks Jody about what happened. Dean pulls her aside and tells her off for her behavior, particularly her rudeness towards Jody who has done everything she can to give Claire a normal life.
Later, Claire works with Sam on trying to figure out what's going on. Dean tells them that the weird fiber found at the crime scene was asbestos while Jody tells them that the janitor's alibi checks out. Sam finds that the janitor has a false social security number and a smug Claire informs them that the janitor started working at the school just before the disappearances that Jody didn't believe were weird started. As Sam and Dean go to investigate the janitor, Jody takes Claire to beg the registrar of her school to allow her to reenroll. The two are attacked by the janitor who turns out to be a vampire and Claire and Jody are kidnapped.
In the vampire nest, Jody and Claire note the drained corpses nearby and Jody realizes Claire was right about the disappearances. Claire watches as the janitor, Richard Beesome explains to the captured Alex that the whole thing is revenge for Alex feeding him to her nest three years earlier. Richard takes Claire to feed on her as part of his plan to destroy everything Alex loves and Alex offers herself in exchange for Claire and Jody if Richard lets them go. Richard starts to feed on Claire, but stops when he senses Sam coming and he and Henry go to confront him. As Sam fights the vampires, Claire retrieves a box cutter from a nearby toolbox and cuts herself free. As Richard goes to kill Alex, Claire stabs him in the back with a crowbar, distracting him long enough for Dean to kill him. Claire watches as Alex confronts Henry and punches him in the face before Claire cuts his head off.
The next morning, Claire and Alex attempt to make breakfast for Jody and Claire reassures Alex that what happened to them wasn't her fault. As Sam and Dean leave, Claire tells Sam she realizes what she has in Jody and Alex and isn't going to take off. She promises not to "hunt like a dumbass" and as she doesn't intend on stopping, Jody is going to teach her to hunt properly. Claire is surprised that Alex is planning to leave once she gets her life together and tells Alex she doesn't have to leave to protect them. Alex tells them she isn't, she just can't be around the monsters they hunt. Claire then watches with Jody and Alex as the Winchesters leave.
In Celebrating The Life Of Asa Fox, Jody tells the Winchesters that Claire and Alex are in Omaha at a Radio Head concert.
In Ladies Drink Free, Sam and Dean find out that Claire has been secretly hunting behind Jody and Alex's backs. They find her working on a werewolf case, investigating the death of Ben Foster. She had interviewed two men, Justin and Connor, and described the latter as being "grabby", leading the brothers to suspect him.
Claire is eventually kidnapped by Justin, whose plans to turn his girlfriend, Hayden Foster, into his werewolf mate were foiled by Mick Davies, who killed the transforming Hayden as per British Men of Letters protocol. Justin decided to turn Claire instead, and bit her, while trying to convince the young hunter that they are very much alike. Claire denies this, saying she has a family of her own who loves her, referring to Jody and Alex.
Sam and Dean are able to arrive at their location through a tracking device left in Claire's coat by Mick. By then, Claire has begun transforming, forcing Dean to restrain her. Mick stabs Justin with a syringe in order to extract live blood and use it as a possible cure for Claire. Justin fights back, but is shot dead by Mick with a silver bullet.
Thanks to the blood retrieved by Mick, Claire is successfully cured although the process is painful. Afterwards, she hugs Dean and thanks both him and Sam for their help and calls Jody and leaves her a voicemail telling Jody the truth about what she's been doing. At the end of the voicemail, Claire states her intention to continue hunting on her own for awhile but believes she is ready thanks to Jody being her mother.
In Who We Are, Claire is displayed as one of the British Men of Letters targets. Her location is given as "in transit". However, before the attack can be launched, a team of hunters led by Sam and including Jody storm the compound and wipe out the operation.
Claire was once an ordinary girl living an ordinary life with her devout father and loving mother. Her life began to change when the angel Castiel took her father away. Months later, her family was attacked by demons. Her experience with the supernatural has hardened her, but the most influential period of her life was after her father was taken away a second time, leading her mother to go look for him, and leave Claire behind in the process.
Practically alone, Claire was forced to become more independent and commit several illicit activities. Although she relied on certain individuals such as Randy to grant her shelter, Claire was now willing to lie and steal to better her own life. Her behavior matched a typical problem child.
Years of resentment towards Castiel for ruining her life did not serve her well, and she was distrustful of him and highly bitter. She was even willing to let Dean get killed, seeing the Winchesters as only enemies despite their friendly intentions. It took a reunion with her mother and much talk from Castiel and the Winchesters for Claire to finally let go of her resentment and become a more happier person.
As Jody's adopted daughter, Claire continues to seek an independent lifestyle, favoring hunting over a normal school life which she would have preferred originally. Now an outspoken, brave, and self-confident young woman, Claire has succeeded in finding balance in her own life despite the imperfections. After being briefly turned into a werewolf, Claire fully accepted Jody and Alex as her family, calling Jody her mother in a voicemail she left her.
Despite putting on a tough exterior, Claire admits to Dean in a vulnerable moment that the truth is, she is barely keeping it together on a daily basis.
Claire has bright-colored eyes and long blonde hair. As a child, she was well-dressed and kept her hair long. As a teenager, Claire's rebellious phase and harsh life drove her to wear dark eyeliner and make her hair curlier. Her outfits usually consist of trousers, a shirt, and a jacket. After moving in with Jody Mills, Claire did away with the dark eyeliner and eventually started wearing lighter themed clothes.
- Season 4
- Supernatural: War of the Sons (mentioned only)
- Season 10
- Season 11
- Season 12
During her time with Randy, Claire was given a revolver so she could rob a store. The gun was presumably confiscated by Castiel when he caught her in the act. Later on, Dean gives her a handgun which she is allowed to keep, on the grounds that she "didn't shoot him". She is shown trying to use this particular handgun against Tamiel to no effect. After killing Tamiel, Claire takes his angel sword, a weapon she is shown to use against suspected monsters in Sioux Falls.
- Following Claire telling Castiel that she likes him better in a tie in the Hunter Games, Castiel starts wearing a tie again as shown in the Executioner's Song for the first time continuously since he lost his grace.
- In Lily Sunder Has Some Regrets, it is revealed that Claire is Castiel's second female vessel. Castiel also possessed a woman in 1901 for an unknown period of time.
- Claire is the only werewolf to have ever been cured.