Changes

|dates= ???? – 2017 (killed by [[Castiel]])<br>2017 – 2020 (becomes the new incarnation of absorbed into [[Deaththe Empty]])|location= [[Death's Reading RoomThe Empty]]

Billie is a [[reaper]] who was collecting [[soul|souls]] in Superior, Nebraska, after [[the Darkness]] was released. After the death of [[Death]], Billie made it her mission to ensure that the next time [[Sam]] and [[Dean Winchester]] die, they remain dead, threatening to take their souls to [[the Empty]] to ensure it. After getting killed by [[Castiel]], she is reincarnated as the new [[Death]] and gains more understanding of the importance of the Winchesters' roles and their survival. However, its later revealed that Billie's true plan is to become the new God once [[God]] and [[the Darkness]] have been killed. Thanks to the sacrifice of Castiel, a mortally wounded Billie is absorbed into [[the Empty]] by the [[Cosmic Entity]].

* [[Cosmic Entity]] – Billie fears the Cosmic Entity as it is capable of killing her, which is shown when it drags her into the Empty.* [[Death's Scythe]] – As the new incarnation of Death, Billie can now only be killed with her own scythe. Dean slices her hand and shoulder with the scythe. While not immediately fatal, these wounds caused her body to slowly rot away and she claims they would eventually kill her.

After [[Dean]] has [[Sam]] temporarily induce induces his own death on him, his [[reaper]] [[Jessica (Reaper)|Jessica]] realizes who he is and reports that Dean Winchester is in [[the Veil]]. When Sam's attempt to revive Dean fails, Dean is surprised by the sight of Billie, who reveals that after Castiel killed her, she became the new [[Death]], explaining that when Death dies, the first reaper to be killed after him will take up his mantle. Telling Dean they need to talk, Billie teleports herself and Dean to a place she refers to as her "[[Death's Reading Room|reading room]]." She tells Dean that she has heard that he and Sam have been jumping universes and questions him how that is possible. Dean tells her that as Death she should know, but Billie replies that this information eludes her, much to her annoyance. Realizing Dean has the upper hand, he strikes a deal: in exchange for the information, Billie must release the souls trapped in Meadows' home. Billie agrees to the terms and has Jessica usher the souls out of the Veil. Curious as to why he didn't ask her to revive him, Dean tells her he figured it was a moot point and was prepared to die. Billie tells him he has changed and no longer has the same bravado of a man that has died multiple times. Dean explains that after his recent failings, he is prepared to die if it is his time. Billie, however, shows Dean a shelf with notebooks dedicated to him, and the various ways that he may die based on his choices in life. she tells Dean that now is not his time, and that with her taking on the mantle of Death, she sees the big picture, and much to her chagrin, she finds that he and Sam are important and that they have work to do and that's all he needs to know. When Dean attempts to ask her about [[Mary]], Billie sends him away, resurrecting him.

Billie's instructions lead Jack and Dean to [[Adam and Eve|Adam]], the First Manfirst man, who has spent the last 300,000 years finding a way to kill God. Adam reveals that the plan that Billie is using is actually his and that Billie has kept been giving them a hand. Using the [[Key to Death]], Sam visits [[Death's Library]] in search of Billie, but finds the [[Cosmic Entity]] who is attempting to force the [[reapers]] to call Billie for it. The Entity reveals that Castiel's visit to [[the Empty]] in search of [[Ruby]] had shaken its trust in Billie and her plan. To Sam's shock and horror, the Entity explains that Billie wishes to kill God and [[the Darkness]] in order to take over as the new God herself in the power vacuum that will be created. Billie intends to put everything back as it belongs: the Entity asleep, the angels and demons back in Heaven and Hell respectively, those who should be dead gone again and those from other realities back where they belong. Though the Entity has found God's death book, only Billie can read it. Sam convinces the Entity that Billie sent him and it gives Sam the book. Returning to the Bunker, Sam attempts to stop Jack from killing Chuck and [[Amara]] in order to stop Billie's plans. At the same time, Chuck reveals to Amara that He actually manipulated time and space to get events to this point and goaded Billie, all as part of [[Chuck's Endings|His true ending]]. Sam reveals to Dean Billie's true intentions, stating that if she succeeds, all of the people that they have saved will die and everyone they rescued from [[Apocalypse World]] will be sent back to a world that no longer exists. Sam eventually talks Dean down, causing Chuck to depart in a rage after stating He no longer cares what happens. ===[[15.18 Despair]]===Billie suddenly appears and angrily tells the group that they've done enough and were so close, but Dean points out that Chuck saw the whole thing coming with Sam stating that it was doomed. Billie insists that it was doomed because of them. Castiel states that Billie led Jack through his trials and knows what is happening to him and so can stop it. However, Billie states that can't stop it but she can do something else: grasping Jack by the chin, she causes him to vanish and reappear in [[the Empty]]. Billie explains to the Winchesters and Castiel that she sent Jack to the Empty because it was "the only player on the board that could possibly absorb that impact" with Chuck and Amara gone. Billie confirms that it's done now and that Jack is "maybe" dead. Dean reminds Billie that she told them that it was a suicide mission, but Billie clarifies that she had only said that taking out Chuck and Amara would be fatal, which Castiel realizes is because it would cause a chain reaction. However, the [[Cosmic Entity]] is different, not as strong as Chuck or Amara but vast and if both it and Jack survive, it will be pissed, especially after what she just did. Dean is unsympathetic and Billie reminds them that the Entity can't come to Earth, which Sam confirms, stating that it can't come without being summoned. Dean and Castiel demand that Billie bring Jack back if he did in fact survive, but Billie refuses until she gets what she came for. Billie demands [[Chuck's Death Book]] back from Sam, but Sam confronts Billie about the fact that she had always intended to betray them once they defeated God in order to take power herself and how everyone who got a free pass or a second chance, were all gonna die, including Sam and Dean. Sam accuses that of being the order she wants restored and her true endgame. Billie doesn't deny it and Castiel points how Billie lied to everyone. Sam questions what would stop Billie from stabbing them in the back if he does give her the book, but Billie says that Sam has no choice as Jack won't last long even if he is still alive and if they want him back, Sam will give her the book now. Sam reluctantly brings in the book, but drops it on the table instead of handing it to Billie directly. Billie opens the book to the end, revealing that since they ruined the last one, the book has a new ending. Dean impatiently demands that she bring Jack back now, but she shushes Dean and just continues reading. Visibly pleased by what the book says, Billie comments that it's interesting before bringing Jack back from the Empty. However, Billie states that Jack is hers as Jack is still useful. As Billie prepares to take Jack and leave, Dean grabs [[Death's Scythe|her scythe]] and swings at Billie. Though Billie avoids a killing blow, Dean slashes her shoulder, causing it to glow and Billie to drop Chuck's book. Tossing Dean aside, Billie grasps her wounded shoulder and teleports away without Jack, the book, or her scythe. Billie walks through her library where a reaper states that he has put up the warding that she asked for this purposewhich should stop the Entity from getting back inside. Billie confirms that the plan has in fact changed. Subsequently, when people start vanishing from existence, the Winchesters suspect that Billie has begun to strike. After discovering that Eileen is gone too, Sam decides to get everyone somewhere safe for as long as he can while Dean decides to kill Billie using her scythe in order to stop Billie for good. [[File:BillieDies.jpg|thumb|right|350px|Billie is taken to [[the Empty]].]]Armed with the scythe Dean and Castiel enter [[Death's Library]] using the [[Key to Death]]. Dean finds Billie standing at her table where she quips about it being the part where she greets him with "hello, boys" before doing so as Castiel emerges as well, armed with an [[angel blade]]. Billie mockingly asks if Dean intends to kill her with her own weapon, commenting that he'd better improve his aim. Dean states that he wasn't trying to kill her before, but now she's killing all of his friends. Calling it interesting, Billie throws Dean across the room and begins choking Castiel before lifting him off of the ground, reminding him how he stabbed her in the back. Dean attacks Billie again with the scythe, pinning her to the wall and cutting her hand. As Billie struggles to keep the scythe away from her throat, Dean states that it's over and demands that Billie call it all off and stop killing his people. To Dean's shock, Billie reveals that she is not responsible for killing Dean's friends and he is in the wrong place. Billie reveals that if people are disappearing, it's most likely Chuck who is responsible and thus Dean is just wasting time by coming after her. Billie then explains that Dean had mortally wounded her earlier and shows Dean and Castiel her festering shoulder wound. As a result, while Billie doesn't care about Dean's friends and family, she now wants him dead and is pleased to have the chance to make that happen. Disarming Dean, Billie strikes him across the face and swings her scythe at Dean and Castiel, who dodge the strike. Billie throws them with telekinesis and the two flee through the door back to the Bunker with Billie chasing after them.

Using the [[Key As Dean tries to figure out what to Death's Library]]do, Sam visits [[Death's Library]] in search of Billie, but finds the [[Cosmic Entity]] who is attempting to force appears on the [[Reapers]] to call Billie for it. The Entity reveals that CastielBunker's visit to [[the Empty]] in search of Ruby had shaken its trust balcony, her wounded right hand now wilted and shaking, and causes pain in Billie and her plan. To SamDean's shock and horrorheart. Chasing them, the Entity explains that Billie wishes to kill God calls Dean rule-breaking and death-defying and the Darkness in order everything that she lives to take over as the new God herself in the power vacuum that will be created. Billie intends set right, to put everything back as it belongs: the Entity asleepdown, the angels and demons back in Heaven and Hell respectively, those who should be dead gone again and those from other realities back where they belongto tame. Though Dragging her scythe against the Entity has found God's death bookwall, only Billie can read itcontinues taunting Dean while casually strolling through the Bunker after Dean and Castiel. Sam convinces Billie chases the Entity two to the dungeon where Castiel puts up a [[Warding Sigils|ward]] in blood that blocks Billie sent him and it gives Sam the book's grip on Dean.

Returning to Undaunted, Billie begins pounding on the door causing the Bunker, Sam attempts sigil to stop Jack start sparking as Billie slowly breaks through it. Castiel suggests that they can wait Billie out since she is already dying from killing Chuck her wound and Amara in order to stop Billieif they can's planst, they fight. At the same time, Dean knows that they'll lose and that he just led them into another trap because Dean couldn't hurt Chuck reveals and so needed something to Amara that He actually manipulated time and space kill instead due to get events his anger. In order to this point and goaded fulfill his deal with the Cosmic Entity, the one being capable of stopping Billie, all as part Castiel expresses his love for Dean and experiences a moment of [[Chuck's Endings|His true ending]]happiness. Sam reveals As Billie finally breaks through the door, a portal to Dean the Empty opens. Billie's true intentionsslowly approaches, stating that if she succeeds, all of watching as Castiel shoves Dean to the people that they have saved will die and everyone they rescued from [[Apocalypse World]] will be sent back ground to a world that no longer existsprotect him. Sam eventually talks Dean downThe Entity sends two dark tendrils through the portal, causing Chuck one of which absorbs Billie and drags her to depart in a rage after stating He no longer cares what happensthe Empty while the other does the same with an unresisting Castiel.