Following her son's birth, Kelly passed on and her soul ascended to Heaven. While there, she lived out her childhood memories before she was visited by her recently deceased son. The two connected and she protected him from a lurking threat before Castiel intervenes on Jack's behalf. After hearing Jack will be resurrected, Kelly parted with her son and thanked him for letting her see him for the first time.
Her dog, Roosevelt, was run over by a car while Kelly was in high school.
Kelly began working for the president at an unknown time. She was considered trustworthy. After Jefferson's wife died, he and Kelly began an intimate and sexual relationship.
When Lucifer possesses the president, Kelly unknowingly takes the archangel to her bed thinking he's her lover. While lying in bed, she explains to "Jeff" that she finds the secret nature of their relationship exciting, but she wishes she could be open about their feelings for each other, but knowing the public would disapprove, they are forced to stay quiet.
Kelly believes Jeff is still lonely after the death of his wife and Kelly respects that, but she hopes that one day the two of them could get married and have a baby. She also believes that Jeff truly loves her.
When Kelly suggests Jeff would make a great father, Lucifer is inspired to have a child with her and they sleep together a second time. After Kelly becomes pregnant, Lucifer expresses his delight, happy to have created something. Kelly is noticeably disturbed by his behavior and she realizes the president is acting strange, but she brushes it off as a result of stress.
Sam, Dean, Castiel, Rowena, and Crowley eventually arrive at her location to inform her of the truth, that her unborn child is the spawn of the Devil, not the president. They convince her to lure Lucifer to her location. Once the president has arrived and the guards confirm the room is secure, Kelly informs Lucifer that she can't have his child, prompting Lucifer to choke her and insist that she does. Just then, the gang ambushes Lucifer, having fooled the guards into thinking no one was there.
After they successfully banish Lucifer, the gang urges Kelly to leave. Castiel escorts Kelly to a diner, where she manages to trick him into letting her go to the restroom, from where she escapes and enters a cab. She calls Castiel to inform him that, as the child's mother, she can't bring herself to get rid of it. She hangs up, leaving Castiel in a panicked state.
Her disappearance sparks concern for the Secret Service, with Rick reporting that he isn't sure whether she is alive or not. Castiel begins tracking her down soon after.
Kelly reappears at another diner a few months later with her pregnancy visible. She is low on cash but manages to order fruit juice from the waitress who approaches her table. That night, Kelly is confronted by the waitress and an unnamed man, who reveal themselves to be angels. Before they can harm Kelly, Dagon arrives and rescues Kelly from the angels. Dagon takes Kelly to a warehouse and offers to protect both Kelly and her child, revealing at the same time that the unborn child is a boy. Kelly ultimately agrees.When Kelly begins experiencing "weird little pains", she insists on having her baby checked out, so Dagon takes Kelly to see Dr. Turner. The doctor informs Kelly that everything is fine. To ensure Kelly cannot be traced, Dagon orders her subordinate to kill the doctor. Dagon also goes on a shopping run to purchase supplements recommended by Dr. Turner.
While awaiting Dagon's return, Kelly receives a call urging her to return to the doctor. The call is a trap and she is subsequently captured by Dean Winchester. Dean and Sam intend to take her back to the Bunker, while Mick Davies argues that the baby is too dangerous to let live. Just then, Dagon arrives and attacks the group, and retrieves a reluctant Kelly.
At their hideout, Dagon handcuffs Kelly to a bedpost out of distrust and informs Kelly that giving birth to a Nephilim is fatal to the mother, meaning that Kelly herself is going to die. This is why Kelly was suffering from pain, and it was only the beginning of what she is going to experience.
In The Future, Castiel and the angels' raid Kelly's hideout and Castiel succeeds in retrieving Kelly. Castiel has orders from Heaven to take Kelly to the Heavenly Portal which will kill both Kelly and her child. Kelly insists that her child, despite his enormous strength, can learn to do good for the world, though Castiel expresses doubt, saying he can't take the chance.
Castiel and Kelly arrive at a motel. Here, Kelly reveals her attempt at suicide by slitting her wrists. She tells Castiel that her baby saved her by bringing her back to life. This is why she believes there is a purpose for her, that after all the suffering she's going through to carry the child, everything will turn out okay. Kelly places Castiel's hand on her belly and the two sense the child kicking.
However, Kelly's eyes flash gold, indicating possession by her own child. Once they are back outside, Kelly decides to go to the Heavenly Portal because it is what her baby told her to do. Once there, Dagon arrives and kills Joshua, but before she can take Kelly away, Kelly's child reacts by empowering Castiel and helping him fight and kill Dagon. Castiel then drives off with Kelly, his faith in the child renewed due to visions of the future given to him.
In All Along the Watchtower, Castiel relocates Kelly to a lake-side house which the two heavily decorate in preparation for the baby's birth. Kelly records a video for her son to watch, promising him that angels are watching over him. Shortly before she goes into labor, Sam and Dean arrive at their location with their mother Mary in tow. Sam and Dean recruit Castiel in dealing with Lucifer, who has come to collect the child. Mary, meanwhile, stays by Kelly's side during the delivery.
Kelly suffers great pain before golden light travels up her body. As she glows, Kelly goes still. In her last breath, she tells her son that she loves him, and a bright light erupts between her and Mary as the baby is born.
Sam returns to the house soon after to find Kelly lying dead on her bed. Sam closes her eyes and walks away, feeling remorse over her death. Sam finds out that Kelly's son, whom she named Jack, had walked over to the nursery and is now a fully grown man.
In Lost & Found, Jack states that Kelly's soul is in Heaven. He has also learned a great deal about the world from Kelly, telling Sam that "I was her". As a result of Kelly's lessons, Jack sees Castiel as his father instead of Lucifer and as Kelly predicted, shows a childlike demeanor instead of an evil one.
After returning to the cabin, the Winchesters decide to burn the bodies of Castiel and Kelly together in a Hunter's Funeral. Though offered the chance to speak, Jack has no idea what to say to his mother.
In The Rising Son, Jack has flashbacks to several of the things Kelly said to him while he was in her womb. Sam reassures an upset Jack that Kelly had thought he was worth everything that's happening along with Castiel and Sam himself.
In Patience, Sam gives Jack a laptop so he can watch the message Kelly recorded for him shortly before Jack's birth.
In The Big Empty, Jack tells the shapeshifter Mia Vallens about Kelly and shows Mia Kelly's message. Jack asks Mia to take on Kelly's form so that he can see his mother at least once and she complies. Jack then confides in "Kelly" about his fears of being a monster.
In Tombstone, after Castiel's resurrection, Jack tells him that Kelly is in Heaven. Castiel confirms it, calling Kelly "a very brave woman." Jack expresses an understanding of why Kelly trusted him and Castiel expresses faith that Kelly was right in believing that he would do amazing things and change the world. "Kelly would be so proud of you," Castiel promises.
In Exodus, after meeting Lucifer for the first time, Jack flashes back on Kelly's message to him. After Lucifer tells Jack how messed up humans are and willing to be led, Jack reminds him that his mother was human. Lucifer admits that Kelly was "awesomely incorruptible, not like that" and tells Jack that she was also a great kisser and that he lost his virginity to her. Before he can continue discussing that subject, Lucifer realizes how inappropriate it is and stops.
In Let the Good Times Roll, after Jack rejects Lucifer due to his actions, Lucifer angrily comments that Jack is too much like Kelly.
In Gods and Monsters, Jack visits Kelly's parents, his grandparents. It is revealed that Kelly named her son after her father who is also named Jack. Kelly's parents tell Jack that Kelly had claimed she was going on a long trip and would contact them when she could and they are unaware of her death, showing Jack pictures of his mother as a child. Kelly's parents are aware that she was pregnant, so Jack tells them how Kelly had a son who she loved deeply and about all the things Kelly did that made him feel safe and wanted, even from the womb. Kelly's mom tells Jack that he kind of looks like Kelly and shows him a picture of a young Kelly on a horse who has a resemblance to Jack. Jack later tells Castiel about the visit and admits that he couldn't bring himself to tell Kelly's parents that she's dead or the truth of their relationship.
In Byzantium, after dying and going to Heaven due to his angel and human sides attacking each other after losing his grace, Jack travels to Kelly's personal Heaven to meet his mother. There, Jack finds Kelly's memory of playing with her dog Roosevelt as a child. After Jack introduces himself as her son Jack, Kelly transforms into her adult self and embraces her son for the first time. Kelly is confused as she remembers Roosevelt dying when she was in high school, leading Jack to explain that she is in Heaven and in her past memories. Kelly remembers that she died giving birth to Jack and realizes that he is dead too. Jack reassures an angry Kelly that Castiel, Sam, and Dean did their best to take care of him, but that things didn't go as planned and he needed to make sure she is okay. Kelly quickly realizes that something is wrong. Jack explains to Kelly about the dark force chasing him and they take cover in the house as they catch up.
Later, Jack notices something coming and orders Kelly to run while he distracts it, but Kelly refuses to leave her son's side. To their surprise, Kelly and Jack are greeted by Castiel. Kelly shares a warm hug with her old friend and assures him that he didn't fail her as Jack is wonderful. Castiel explains that they have found a way to bring Jack home, relieving Kelly until Castiel explains that they will need to use magic that draws on Jack's soul to heal him. After learning that it will use up a small piece of Jack's soul in the process, Kelly becomes worried, forcing Castiel to explain that the Shadow has invaded Heaven to take Jack to the Empty. However, he states if Jack is alive again, the Shadow will leave Heaven and the angels alone.
At the moment, they are interrupted by the Shadow in the vessel of the angel Duma looking to take Jack to the Empty. Though obviously scared, Kelly stands between her son and the Shadow, glaring angrily at the being. As the Shadow beats on Castiel, Kelly steps forward in his defense, only to be struck to the ground by the Shadow. As Castiel makes a deal with the Shadow to trade himself for Jack, Kelly holds her son and watches in surprise but doesn't otherwise intervene.
After the Shadow is gone, Castiel explains that he did it because he made a promise, looking at Kelly who smiles at Castiel and because he loves Jack. Even though Jack feels that he didn't get enough time with Kelly, she tells her son to go and have a great life and she will be waiting for Jack when he returns someday. Kelly hugs Jack and expresses her love for him before stepping back. Wiping away tears, Kelly smiles as she watches Castiel resurrect Jack.
In Moriah, Jack attempts to visit Kelly's parents again, only to learn from her mother that after his last visit, they had made some calls and learned that Jack didn't work with her as he'd claimed. Kelly's mother tells Jack that no one knows where Kelly is and she is feared to be dead. She angrily questioned him on what he did to her daughter, though her yelling is silenced when Jack glared at her with his Nephilim eyes. Jack then left the terrified woman alone, rather than hurt her. While talking with Castiel, Jack admits that he felt great guilt for Kelly's death, blaming himself for it as Kelly died as a result of giving birth to Jack. However, in his soulless state, Jack feels nothing, including that guilt that disturbs him.
Kelly: Something happened to me, Castiel. I lost hope. I tried - I killed myself. I slit my wrists. I died. And then... he saved me. He brought me back to life. [...] His power, his soul surged through me, and it was good. Pure. I feel I know he is good.
— Kelly and Castiel about Kelly's child
in The Future
Her subsequent pregnancy would alert the Winchesters to her, and cause her to learn about angels and demons. Although made fully aware of Lucifer's deception and was willing to help lure him into a trap, she did not feel the same way about her potentially evil child. Despite the potential dangers, Kelly chose to keep the pregnancy and went on the run to keep her child safe. She also showed great concern over the baby's well being, possibly the result of Kelly's former desire to have a normal family-orientated life.
Her love for her child can prove to be a weakness, as Kelly was alright with staying by Dagon's side for the child's sake, despite Dagon's identity as a demon and she was easily lured back to a clinic by Sam out of fear her unborn child needed help. However, Kelly began having doubts about her sons future as after she learned from Dagon that delivering the child was fatal and hearing Dagon's own opinion on the child, she became convinced of the chance her that her child, as Lucifer's son, could actually be evil and wreak havoc on the world. This drove her to commit suicide, since she could no longer risk allowing an evil force into the world and apologized to the baby for what she was about to do.
The baby refused to die, however, and subsequently resurrected and healed his mother, allowing Kelly to feel her baby's essence and realize, with great certainty, that her baby was good, not bad as everyone believes. Her newfound trust in her baby drove her to trust visions delivered from the child. Kelly even became convinced that her baby had a chance of bringing the world back on its feet, rather than destroying it. She even began to express a belief that all her suffering was not for nothing and that there was even a purpose behind it all.
After convincing Castiel of her son's goodness, while she was upset that she wouldn't be able to be there for him, she placed her trust in Castiel to protect and guide her son after his birth, promising her son that Castiel would keep him safe. Kelly developed a close friendship with the angel who she considered a good person to raise her son. Upon being reunited with Castiel in Heaven, Kelly greeted him with a warm hug and felt that he had kept his promise to her as Jack was wonderful.
In her final moments, Kelly was completely driven by her love for her unborn son, whom she named "Jack". She painted his nursery and made him a video, and openly wished for his safety and well being. She died thinking only of him.
While in Heaven, Kelly was shown enjoying her childhood memories, going along with her words of having childlike manners, apparently unaware that she was dead and in Heaven. When Jack appeared and revealed his identity, Kelly reverted to normal and finally embraced her son while expressing joy at having the chance. She also tried to protect him from the Shadow but failed. Before parting ways with him, Kelly implored her son to live a full life and thanked him for letting her share a memory with him. Kelly was visibly emotional at watching Jack's resurrection, wiping away tears, but also happy that he got a chance to live and willing to wait to be with her son when he came back.
- Season 12
- Season 13
- Lost & Found (flashback, mentioned and corpse only)
- The Rising Son (flashback and mentioned)
- Patience (video footage only)
- The Big Empty (video footage only)
- Tombstone (mentioned only)
- War of the Worlds (mentioned only)
- Various & Sundry Villains (mentioned only)
- Devil's Bargain (mentioned only)
- Good Intentions (mentioned only)
- Exodus (flashback and mentioned only)
- Let the Good Times Roll (mentioned only)
- Season 14
- Kelly is the first and only known woman to become pregnant by an archangel.
- She is also the first woman confirmed to be the parent of a Nephilim.
- She is the second-known woman to be in a romantic relationship with an archangel, the first is Kali, who was Gabriel's lover.
- She has been called Rosemary by various characters. In pop culture, it's a reference to the film Rosemary's Baby, which is a movie about a woman that was also pregnant with Lucifer's child.
- She named her son after her father.
- Jack keeps a picture of Kelly at his bedside as seen in Season 14's Byzantium.
- Her year of birth is 1978 as seen on the door to her Heaven in Season 14's Byzantium. This makes Kelly thirty-nine at the time of her death.