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encantadiafan12 · 1 year

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Draco Malfoy x Nezuko Kamado’s twin-sister! Slytherin! Muggle-born! Reader (feat. Muzan Kibutsuji x Nezuko Kamado’s twin-sister! Slytherin! Muggle-born! Reader; Good ending)

Angel of Darkness Au part 2: A witch's anger 🔥

Warnings: Mentions of Death, neglect, torture, use of protego diobolica and attempted murder

(A/N: Crossover with the current timeline and Muzan of the alternative timeline feelings towards Y/n is only one-sided.)

The Slytherin lady and the chosen one were lock in a ferocious duel however being trained by her father at a young age she easily overpowered Harry. She later apperated back to where her pathetic excuse of a brother was. It continues as they were trying to kill the man she saw earlier, but oddly strange he is not easy to kill.

Y/n then sees someone she hasn't seen in a very long time. Her duel against Harry was almost an hour. She recognize her sister who is about to turn back into a human approaching for their brother. The Slytherin lady then flies to her into a black mist. Through those moments Nezuko was turning back into a human from her gaining the memories when she was a demon. Her memories when she was human. The night Muzan Kibutsuji killed her mother and her other siblings while Tanjiro is away. She later regain back her identity. When this happened, Y/n appears in front of her while her twin looks in shock. “Y/n??” she asks as the Slytherin lady smirks. “Hello, Nezuko...” she says in a monotone.

While this is going on. Tanjiro, the Hashira, and Tamayo then continue to fought against Muzan. The Demon King was far too strong. With Y/n and Nezuko with the Slytherin girl then pointing her wand at her. “Tanjiro can say goodbye to his precious favorite sister....” she then says as she was about to cast a spell. That is until she hears a the sound of a biwa as diverts her attention towards where her pathetic excuse of a brother was. Shoji doors were at the bottom of him and everyone. They some them open making each slayer fall and of course Muzan and Tamayo. Nezuko scream calling out to their brother while the Slytherin lady smirks before turning into black mist following them. This is going to be interesting however what she didn't know Draco and Harry witnessed everything unfolded as they were surprise as they decide to ask help from someone but not somebody back in their home dimension but rather those from a different timeline. They then made their way to the gate way leading to the alternative timeline.

5 minutes later....

They found themselves on America?! The Wizarding World in this country is more strict back on England. They found themselves at a mansion. Harry and Draco say two figures the first being similar to their Y/n except she seems calm and the other similar to the man they saw from before except he has white hair. The two then notice them as the Slytherin lady's look alike look at her in surprise. “Potter, Draco I didn't expect you would come around here.” she says as the man beside her glares daggers at the blonde Slytherin as if he wants to kill him. Y/n then notice this as she narrows her eyes at him. “Dear, no....” she says in a warning tone.

He then huffs as he crosses his arms. The Slytherin lady sighs. “Sorry, about my husband. Draco, you shouldn't have come. You knew how much Muzan wants to kill you.” she then carefully says as the two look at them surprise. Wait? The man who stand right beside her was her husband in this timeline and not to mention he wants to kill Draco’s counterpart in this timeline. For what reason?

Harry then clears his throat. “Actually we are not the way you know. We are actually from another timeline and we need your help.” he says as this time Y/n and Muzan are surprise. The Slytherin lady then read their minds while the former Demon King then sniff them to see if they are telling the truth to which they are. The chosen one and the blonde Slytherin start to explain about the timeline they came from to which Y/n and Muzan frown. “A timeline where father died and I gotten crazy trying to kill everyone in mine and my husband's home dimension. Just to make them feel the pain I felt.” the Slytherin lady then says as her husband hums. “So in your timeline I was one of the people that my wife's counterpart wants to be killed. Well, that's strange and a bit upsetting.” he says as he refers to the last part that his counterpart didn't knew Y/n. “We only need your help, Y/n. In other to stop the version of yourself from our timeline on what she was doing.” Draco then says as he looks down. “We also need your father's help as well. I know he's the only one who can calm you both down when you're angry.” Harry adds as the two were surprise. “You need mine and my father's help?” The Slytherin lady then questions as the two then nod. Y/n sighs before they then took a portkey to England. Pretty much they appear at the forest when no one could see them. When they came to the location they arrived at Spinner's End.

The former Potions Master then notices them. “Y/n, Muzan...” He says a bit surprise to see his daughter and son-in-law. He later notice Harry and Draco. “You and Draco as well, Potter.” Severus then finishes as he crosses his arms. The Slytherin lady alongside with her husband looks at him. “Dad, we need your help.” she then says.

They then explain to the former Potions Master about what's going on. At that Severus cross his arms. “So in this alternative timeline. I died, Y/n’s counterpart wanting to kill the people in her and her husband’s home dimension. With my son-in-law’s counterpart not knowing my daughter and of course was one of the people she wants to kill.” he then says as slowly starts taking the information that he was given. “Figuring that my daughter's counterpart wouldn't be able to calm down if it was herself trying to understand. Well, she seems to calm down around me.” He then adds. The chosen one then looks at him. “Will you help us, sir? We can't risk of losing her.” he pleads.

The former Potions Master then thought for a moment before he then sighs. “Alright, I'll help you.” he then answers as that made the two males look relieved that Snape of this timeline is able to help them. Muzan then looks at his wife. “Are you sure you don't want me to come along?” he asks as he holds her hands. Y/n then gives him sad look. “I really want you to come but we couldn't risk about your other self to know that you were my soulmate and the part that were married. As we know our counterparts don't know each other.” she then says as Muzan sighs they have a choice. “Alright, but promise you'll come back safe.” he says. “I will. I promise.” the Slytherin lady then says.

Afterwards, they then open the gateway to the other timeline. The former Demon King hopes that his wife would be safe. To where Y/n’s counterpart was, they then end up in a place that has a lot rooms and shoji doors everywhere like a big maze. Harry was surprise to know that the Slytherin lady he knew would follow her brother here. As they then observe from a far to see Demon Slayers attacking Lower Moon Demons at easily cutting off each Demons head. From a far they also Y/n (Bad ending) torturing a Demon Slayer who dare stand in her way from making her brother suffer the pain she felt.

Y/n (Good ending) and Severus have invisibility cloaks around them to avoid anyone from knowing that they are around. Throughout each battle in the Infinity Fortress, the Slytherin Lady (Bad Ending) attempt to kill everyone but she was thwarted by unknown to her (her other self from another timeline). However, unknowingly the Demon King saw her every attempts but he wasn't mad. Quite the opposite he knew she wants to kill Tanjiro to make him regret for sacrificing her to save himself and his other siblings.

After each, Upper moon was killed but Nakime and Kaiguku are the last of them. However, Y/n (Bad Ending) continue her attempts to kill everyone but she was still thwarted. Her several attempts made Muzan feel something he hadn't felt before. He somehow found himself falling in love with the Kamado’s so-called black sheep. Not only those attempts to make everyone suffer her pain that she felt. The Demon King was later confront by Tanjiro and Giyū. “Persistent.” He then says not feeling any regret for killing a lot of innocent people. “You’re all seriously persistent. And it bores me.” He adds as the that stun the two Demon Slayers. “It sickens me from the bottom of my heart. Whenever you open your mouth, you only remember that one dumb motion about avenging your parents, kids, or siblings.” Muzan later admits as Tanjiro still looks stunned by what he's saying. “What are you saying?" He then asks at the Demon King look at him. “Look at it this way, being killed by me is the same as encountering a great calamity. You can't get revenge on natural disasters. No matter how many lives it takes away, rain, winds, volcanic eruptions, and earthquakes. You don't need to think hard about it.” He then says as the two Demon Slayers just remain silent. “You can't bring dead humans back to life. Why not stop fussing over this issue all the time and quietly live to earn your daily wages. Why can't you do that? Most humans live that life. The Demon Slayers are an assembly of deviants. There's only a reason and I'm tired of dealing with deviants. I'm the only one really wants to put an end to all this.” Muzan then says. There was a long period of silence. Before Tanjiro could says something the three of them were interrupted when someone cackle. Black mist then came around and stood in the other side of the room it later then morph to Y/n (Bad Ending) as she looks at the three of them with her eyes narrowed. The Slytherin lady (Bad Ending) then looks at the Demon King. “You have no shame. To me losing my father even though we aren't related by blood. He treated me decently and some people in the Wizarding World too. I no longer return to this world considering on how greedy, arrogant, and selfish they are towards me. Just taking things for granted.” She then rants before looking at her pathetic excuse of a brother. “Since the day I was sacrifice. I was really a fool to wait you, the rest of our so-called ‘family’, and everyone else to notice me but only paying attention Nezuko. That day change everything for me. Throughout the years I was living with my father, the hate I felt towards everyone here continue to grow. When Dad was still alive I have no intention to return here to get revenge on everyone. Even though, I've been familiar with the Unforgivable Curses and the Dark arts spells he taught me. I've only used them when necessary.” Y/n (Bad Ending) then says as the three look at surprise.

The Slytherin lady (Bad Ending) then narrows her eyes. “Vengeance is mine. You and Nezuko don't deserve to live a peaceful life...” she then says to Tanjiro.

Giyū then looks at the burgundy-haired boy. “Keep your guard up.” he then tells. Y/n (Bad Ending) was about to cast a spell before somebody disarm her wand like earlier. The daughter of Severus Snape (Bad Ending) then growls to see who did it. The person then remove the invisibility cloak. She and the other three were surprise. It was Y/n (Good ending), Draco then came around. “You really need to stop. I know what you're feeling right now. But, father's death really affected you to the point you want to get your revenge on everyone here.” The Slytherin lady (Good ending) then says as her other self then grit her teeth. “Nice try, Harry....” she then says. Y/n (Good ending) then sighs. “You really think this is someone under the guise of polyjuice potion but I am actually you from another timeline.” She then took a pause. “A timeline where father is alive....” The Slytherin lady (Good ending) says that made double then pick up her wand as she kept her head down. “A timeline.... Father is still alive, huh? Well, that's something is going to make me mad here.” she then says as she looks up. The blonde Slytherin then looks at her. “Y/n, you need to stop what you're doing. This isn't the way...” he then says. The Slytherin lady (Good ending) then stood next to him. “He’s right you need to stop. Revenge is not going to make you feel better. It's just going to make things worse.” she then says.

Tanjiro then slowly walk up but he maintain his distance from his other younger sister. “Y/n, please you have to stop this." He then says as the daughter of Severus Snape (Bad Ending) then glares at him. “Well, I would be with you right now if you were to treat me decently. But none of you never deserve my forgiveness and kindness.” she then says before then places her hand against the bottom of her left eye. “I got this scar because of you that day and of course the hatred started to grow there. So I have a hard time trusting anyone except some people.” Y/n (Bad Ending) then rants.

The Slytherin lady (Bad Ending) then continues to glare at her brother. “Ever since, father adopted me. I only felt resentment towards everyone here in this world. I take a lot after father but I never let everyone’s words ruin me but unlike you. I have friends and people who care about me for who I am. Severus Snape was my father and having the same filthy blood as you and Nezuko make me hate other Muggle-borns at school. I disregard the Kamado last name and embrace the surname Snape. Everyone in Slytherin like being around me despite my status as a Muggle-born as I'm different from the rest. Everyone (except Pansy Parkinson).” she then adds as her brother keeps his guard up but he was ridden with guilt on the inside.

The Demon Slayer stares at his sister. “Y/n” He calls out as he feels the guilt of ignoring his beloved sister. “I'm sorry” He says making his sister scoff. “Your pleadings are no use to me now.” She says bitterly.

Draco then narrows his eyes at Tanjiro. “No matter how many times you apologize to her. It's not going to work. You really don't know her as much as I did growing up with her.” he then says. He then the others later here huff as they look at her. “Do you know me, Draco? Well, you don't know much about me.” she then says as the blonde Slytherin looks at her worriedly. Y/n (Good ending) knew that the thought of losing her father horrifies her, but in her timeline she was able to save him on time. However in this one she didn't. That's the reason why her other self was desperate to take her revenge on everyone in the dimension she originally came from.

“It may escape the notice of all of you. But life is unfair.” The Slytherin lady (Bad Ending) then says as she looks at the Demon King. “Life is not the way as we see it as there are times things go out of our control. Life is cruel. Fate is cruel. It's not always we get what we want.” she then adds as it seem to anger Muzan but it didn't but he was rather stun instead of being angry which never happened before. “She really takes after her father.” The blonde Slytherin then mutters. Y/n (Good ending) then gives her other self a sympathetic look. “Father’s death really affected you....” She says in a sad tone as the Slytherin lady (Bad Ending then turn to look at her. “You have no idea.....” she then says. Giyū then looks at her. “You need to stop this stupid revenge as it wasn't worth it.” he says as that anger the daughter of Severus Snape (Bad ending). The Slytherin lady (Good ending) sighs as she narrows her eyes at the Water Hashira. “You are not helping. It only made it worse.” she then says as her other self seems angry. “Stupid? Stupid?! What's so stupid about to make everyone in this world to feel the pain I felt?!” she then snaps.

Draco knew he had stop her. “This has to stop now. What ever it is you're going through. We'll fix together, me and you. Just like we've always done.” he then sang as that made Y/n (Bad ending) look at him. “No! This has to stop now. This thing where you think that you've been my friend. And don't even hear how you condescend. The way you've always done.” She then sang not wanting to listen to her childhood friend. The burgundy hair has to do something. “Y/n, listen.” he then starts. “I’m listening.” She then answers when her brother does it. “I know it isn't true.” Tanjiro then sang. “Isn’t it?” She mockingly questions. “Just look into my eyes now.” he then sings as his sister avoids looking at him. “Well?” she then says. “I know you feel it too.” The burgundy-haired boy then sang. “Perhaps I do.” she then sings as she looks at him coldly. “Y/n, listen.” Tanjiro then sings. “I’m listening.” she then says as she crosses her arms while rolling her eyes. “I swear it's not too late.” He then sings while keeping his eyes on her. “So before another line gets crossed and everything we've had is lost. Just.... wait.” He sings as the word ‘Wait’ made her to immediately look at him in disbelief before she frowns. “No, I won't wait.” she mutters before Y/n (Bad ending) then proceeds walking in between her pathetic excuse of a brother, Water Hashira, and the Demon King. She then looks at Tanjiro and Giyū. “There’s a line between the winners,” she starts before looking at Muzan. “and the losers.” she finishes before turning to look at her other self and Draco. “There’s a line between the chosen and the rest.” she then sings as she looks to the side. “And I've done the best I could, but I always known where we stood.” she then sings before looking down at her shoes. “Me here with the luckless.” The Slytherin lady sings before she then looks at her brother and the Water Hashira. “You there with the blessed and line between the beggers and the choosers.” she then sings before she turn around to face the Demon King. “Is a line you've never let quite ignore.” she sings then looks up at the ceiling before reaching out with her hand. “How I've tried to jump that great divine but I've never got the chances you were given.” she sings before turning to look at Tanjiro once more. “You don't how much I've been denied. Well, I'm not being patient anymore.” she then sings before she raises her arm with her wand in her hand and casts the spell which is just as dangerous as Fiendfyre. The Protego Diobolica spell. “I’m crossing the line!" she then sings as her other self proceeds to fire a spell at her but she dodges it. “And I'm done holding back. So look out, clear the track. It's my turn!” she sings out loud. Before she creates a circle of blue flames before she proceeds to make them flow along with her movements. “I’m taking what's mine!” she sang before looking at her brother before firing a spell at him but he manages to dodge it. The Slytherin lady (Bad ending) then looks at the Demon King before firing a spell but he manages to dodge it. “Every drop, every smidge. If I'm burning a bridge let it burn!” she then sings before she flies up surprising the three (except her other self and Draco). “But I'm crossing the line!” She then sings as she turns to look at them. “And for us, if we're over. That's fine!” She then proceeds to leave. “I’m crossing the line.” she then sings as she looks at them before she then flies out of the room into black mist.

Y/n (Good ending) was surprise as she knew that she did master this spell but she rarely use it. The blonde Slytherin looks surprise before he then looks at her. “We have to get out of here.” he suggests as he could see that Muzan then proceeds to leave the room. To which made Tanjiro yell after him as he and Giyū go after him.

Timeskip hours later....

Kaigaku was killed along side with Nakime. The Infinity Fortress collapse as everyone immediately leave when Yushiro tried to turn it against the Demon King as the battle of between the Demon Slayers and Muzan Kibutsuji continues. Nakime was killed in the hands of her master. However, a certain someone knew she had to immediately kill everyone. Y/n then was about to cast the killing curse at her brother while he was fighting against Kibutsuji. Her other self, Harry, Draco, and Severus knew they had to stop her. The chosen one had been involve of thwarting most of his friend's attempts. Tamayo was killed when she sacrifice her life on letting Muzan absorb her to which he absorb the drugs to weaken him.

Severus then casts the patronus charm non-verbally as seeing his patronus would calm his daughter's counterpart. When he did the patronus came out in the form of doe. It immediately made it's way towards her but when it passes through the remaining alive Demon Slayers as they seem shock. When it whirl around the burgundy-haired boy and the Demon King which surprise them as they along with everyone else watch as it then made it way towards Y/n (Bad ending) as she then stop as she immediately put her wand down seeing her father's patronus.

The former Potions Master then took off the invisibility cloak as he came to approach his daughter's counterpart as Y/n (Good ending) watch as her father approach her other self as she watches the scene. When he finally did, the Slytherin lady (Bad ending) fell on her knees as she doesn't know whether or not is she seeing things. D-Dad?” she then questions in a quiet voice.

Severus then has a soft look on his face. “Revenge is not the answer, Y/n. It just will make the pain worse, sweetheart.” he tells her as he kneels down to hug her. When he did, she her arms around him to which she later breaks down crying. The former Potions Master was rubbing the back of his daughter's counterpart. “Even though the me you knew was dead but I have a feeling he forgotten to tell you something.” he says in a soft voice as Y/n (Bad ending) looks at him. “Even though, I'm gone. I'll always be with you no matter what. In your heart.” he says as the Slytherin lady (Bad ending) look at him. Everyone else watch as the moment unfold. Tanjiro was surprise this man was Severus Snape. The one who raised his sister after she disappear when she was 5 years old.

Harry and Draco were relieved that she finally stop. The blonde Slytherin then made his way towards the two. Severus then pull away before then wipes Y/n (Bad ending)'s tears with his hand. The former Potions Master then notice Draco was there so he stood up and move to join his daughter of his timeline while the Slytherin lady (Good ending) watch her other self and the blonde Slytherin. “Y/n, I was worried if you don't stop. I would ended up losing you.” he says as his childhood friend look at him in shock. “Dray, I....” she was interrupted when Draco hug her. “I like you, Y/n Snape. No love you, for a long time ever since when we we're kids.” he confesses as Y/n (Bad ending) looks at him surprise. “I.... I.... I love you, too, Draco malfoy.” she then confesses to him. At the confession between the two. Muzan can't help but feel jealous run through him while the burgundy-haired boy could smell the jealousy coming from him.

Severus who is watching then gives Draco a warning look. The blonde Slytherin then felt it before he sweat drop. If his godfather of his timeline is still alive he would have give him a warning as well. Y/n (Good ending) sighs at her father's behavior before giving her other self a proud smile. In the timeline, she never knew her husband. Speaking of him, Muzan’s counterpart then look at her. She just gives him a soft yet sad smile. The Demon King's face turn red at that. Y/n’s alternative self just smile at him as if she knew him.

The two then pull away as the blonde Slytherin then help the Slytherin lady (Bad ending) stand up. When he did, he pulls her into a kiss to everyone's shock which broke Muzan's heart. Y/n (Good ending) was happy for her other self as she saw the surprise and pale expression of her brother's counterpart. She narrows her eyes at him. “You really should know that she did have feelings for Draco. I did as well..... However, used to.” she then admits but she's not giving hints that Muzan of her timeline was the one she ended up with.

The new couple later pulls away from one another. Draco then smiles at her to which Y/n (Bad ending) smile back at him. She then looks at her brother before she narrows her eyes at him. The Demon Slayer then looks at her. “Y/n, I-” he stop when his sister raise her hand. “Well, getting my revenge on you and Nezuko is not worth it to me anymore. I'm going to continue to live for my father's sake and I would no longer return to this dimension to remain in the world where I belong.” she then says rather coldly at him as Tanjiro and everyone else (except Draco, Harry, her other self, and Severus) were surprised. “Y/n, please....” the Demon Slayer begs as his sister then continues to glare at him. “You did this to yourself and you realize it when it's too late. But as I said earlier, life is unfair. Fate is cruel. It's not always we get what we want. Life is not the way as we see it as there are times things go out of our control. I hate to tell you, but this has to be the way it has to be.” she then says. The Slytherin lady (Bad ending) then looks at her lover and of course Harry. Not before turning to look at her other self as she gives her a grateful smile before she then disapperate with Draco and the chosen one.

Y/n (Good ending) alongside with everyone else watch as they leave. At that moment Tanjiro realize he lost his sister. Forever. The Slytherin lady (Good ending) then open a passage way to her home timeline as her father later walk up to her as the remaining Demon Slayers, Muzan, and her brother's counterpart look at her but she just narrows her eyes at him. Before they both enter the portal afterwards it closes after they left.

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