You and Kyojuro stayed at the mansion for another month. You are a lot every day; you pass out at least three times a day, sometimes less; depending on what you did during the day. Kyojuro got so used to catching you that he could sense it within seconds of no warning. You would pass out, and he would catch you. He would either let you sleep on his thigh, or if you passed out while walking, he would take you back to his room to rest.

You played cards with his brother and played games with the younger demon slayers. Mitsuri got you some clothes, but they were a bit revealing for your taste, so you wore Rengoku's clothes a bit longer until you got clothes that covered you up more. At first, you got a spare set of Mitsuris clothes which she said you looked amazing in since you were as busty as she was but when Rengoku came into the room you panicked and through his clothes at him and screamed.

He was unfazed but was rather confused as to why you were trying to cover up more. He said he liked what you were wearing, but you felt so naked you had to get something else to wear. You got something that was a bit revealing, but it went over the regular Demon Slayer outfit, and you made sure you wore pants with it because skirts weren't your thing.

Tonight, you were going to his father's house to see his younger brother even though your family banned you from his house. You didn't want to cause any problems, but you were going to tell him goodbye before going to your family's home with Tanjiro and his friends as well as Rengoku.

"I don't think this is a good idea," you said as you were going to his house.

"It's okay. My father will warm up to you eventually," he said as you sighed.

"He will never like me, look, I understand not everyone is going to like me, but I don't know why you want your father to like me so much," you said as he smiled.

"You are not like other demons, plus you are a demon slayer," he said.

"It doesn't matter. He asked me not to be there, and I shouldn't be there out of respect for your father," you said as
Senjuro came running out of the house.

"Y/n!!" He yelled as he tackled you.

"Hi! Are you ready for... why do you have a hand mark on your wrist?" You asked seeing someone grabbing him hard.

"Oh, it's nothing," he said as you looked at Rengoku.

"Can I talk to you for a second? You asked as you pulled Rengoku aside.

"What's wrong?" He asked.

"Look at what your father did to your father did to him! He did it because he has been drinking too much, and I'm here! You need to deal with this!" You said.

"I'll talk to him, but I'm more than sure it is because of his drinking and not you," he said.

"It doesn't matter deal with it, or we are taking him away from your father. I won't let this happen again," you said

"Y/n," he said as you looked at him.

"It's abuse, and I know it when I see it. Your brother doesn't deserve it, and like it or not, you have to face facts; he isn't in a good state of mind. I'll even help you take care of him," you said.

"I don't think it will come to that. Just let me talk to him," he said as you nodded.

"Need me to be there?" You asked.

"No, I'll just ask you to take him outside for a bit.

"Alright, I'm sorry, but this needs to be fixed before it gets worse," you said as you went back to his brother.

"Dad went out for a bit to get alcohol so it will be a while before he comes back," Senjuro said as you looked at Kyojuro and then nodded.

You three went inside and started playing games with him, also teaching him recipes you learned on your travels around Japan. Before you knew it, Kyojuro's father showed up with a large amount of alcohol making you upset. As a demon, your father never laid a hand on you or yelled at you for anything, not even your mother. He calmly explained why you should never do certain things and carefully trained you on how to use your demon powers without going overboard and hurting yourself or others unintentionally. As a child, your father was beaten and used as a slave rather than a child, and he refused to do that to you or his first family because he knew how it affected him.

"What are you doing here, demon trash? I thought I told you never to come here!" He growled.

"I asked her to be here. She is leaving soon, and my brother has gotten attached to her," he explained with a smile.

"She corrupted him too, huh? If I see her again, I'm going to kill her myself. Do I make that clear?!" He growled as Senjuro looked at him terrified.

"Yes," Rengoku said, ruling he was drunk yet again.

Rengoku noticed that you knew and looked at his brother. He guessed he never read the letter or bothered to look at it. Before Kyojuro could say anything, his father went back into his room to drink his life away.

"I will go talk to him now," Kyojuro said as Senjuro looked at him nervously.

"You should hold off for now," you said as you sensed something close by.

"What's wrong?" Kyojuro said as you got out your sword.

"I don't know, keep him away from the windows," you said as he nodded.

You went outside, but there was nothing out there. You knew just because you couldn't see anything didn't mean it wasn't there. You walked further from the house and closed your eyes.

"You do know I know you're out here, right?" You said as you waited to get attacked.

A demon came after you, but you quickly killed it and smiled.

"Not so bad," you smiled as you put your sword away but were tackled by a demon and went flying into the house.

Senjuro screamed as several demons were on you, and you were holding them off the best you could.

"Kyojuro, run!" You screamed as you got your sword out and started killing them as fast as you could, but Kyojuro quickly went to go get his sword but was quickly tackled out of the house.

Senjuro ran to his father's room while you were killing the horde of demons that showed up. You tried to get to Senjuro but were pinned to the ground, so you have to use your demon abilities more. You forced your eyes to change into demon eyes, making you stronger and more violent. You started to tear the demons off of you and rip their heads off to buy you time to get out your sword, but when you heard Senjuro scream you ran into the room and saw the demon that tried to kill Rengoku in the first place.

"You!" You growled as you were tackled by demons. You managed to cut some of their heads off as the demon laughed.

"Half demons are weak. I mean, look at you. You know it took me ages to track down this place where the great Kyojuro Rengoku lived and to think his father was a great demon slayer at one point. I know your face and demon slayers all smell the same. Do you know how many demon slayers I had to murder for the location of this house? I turned them into those demons right there. I like working alone, but I just miss him so much. You, however, are a pain in my side! If it wasn't for you, Kyojuro would be alive!" He growled as you ripped out a demon's throat and got out your sword.

"You mean me?" Kyojuro asked as he came into the house calmly. Demons were lying dead outside and disappearing, and you managed to cut the demon's heads off. You were fighting with your sword.

"I killed you. I know I killed you! How are you alive?!" He asked as he looked at you both terrified.

"I may be a half-demon, but I have a few tricks up my sleeve always," you said as you were starting to feel weaker.

"Well, it doesn't matter! I will ask you again; will you join me, or will you die?" He asked.

"Live, I will fight you to the death for the murderers you have committed in your life of Y/n family and other innocent people's lives you ruined by your presence," Rengoku said as you took out your sword.

"Tell me when," you said as Rengoku nodded, and he didn't have to tell you when all he had to do was start moving.

You both were quickly going after the demon at an amazing speed, and since Rengoku and you had been connected for months, your fighting styles matched each other's speed and strength. Senjuro went outside to watch the epic fight that was going on while his father also stood by and watched. Your ice forms and his flame forms were powerful together, and when you both looked at each other and then at the demon. You both nodded at each other as you took off running in a different direction.

"It seems like your half-demon left you! I will ask you one more time. Will you join me?!" He asked angrily.

"No," he said as he got into possession.

"Flame breathing ninth form, purgatory!" He yelled.

"Ice-breathing ninth form, Frostbitee dragon dance!" You yelled as you both slit his throat, making his head fall off.

"You.. you killed me?! You killed me!!! A half-blood killed me!" He screamed as you and Rengoku landed on opposite sides of the demon.

You got up quickly and noticed Senjuro was covered in blood.

"Senjuro, are you alright? Please tell me you didn't get any blood on your mouth," you said as Rengoku's father stood there shocked seeing that fight.

He knew who your mother was, and the shock was overwhelming. But then anger set in because she was a demon slayer, and it was her job to kill demons not to sleep with them.

"I'm fine, I promise! Are you okay? You look terrible," he asked, seeing how hurt you were.

"Yes I'm more than okay don't worry about me I will heal fast," you said as you had to step away from him and started throwing up since you had demon blood in your system now. You shouldn't have taken a bite out of the demon, but what choice did you have at the time?

Rengoku stood up, and to his horror, his father grabbed you by the throat and pinned you against a stone wall.

"You and your mother disgust me! You brought those demons here, and for what? Talk you demon whore!" He growled as he put his hand inside an open wound and your eyes turned back to human eyes but black veins started to appear. You couldn't breathe due to the pain, and due to blood that wasn't coming up, you could build up in your system.

"Let her go now. She didn't do anything wrong they were after you since he thought I died. He wanted me to be a demon and fight him forever, so I refused. If it wasn't for her I would be dead so would Senjuro. She never asked to be born and she never asked for a thank you from anyone. She had nothing to gain by saving my life it almost got her killed. I should have known they were close by, but I didn't. I am the one to blame for this attack, not her," Rengoku said as his father dropped you.

"Fine, I disown you. I never want to see your face again!" He growled as you were throwing up insane amounts of blood.

"Father, don't please! It wasn't their fault!" Senjuro begged as Rengoku smiled at him.

"It's okay, Senjuro. I asked her to be here, and if it wasn't for her, we wouldn't have made it," he said.

"How could you treat your son like that? My father may be a demon, but he never once laid a hand on me! You want to know what a real monster looks like. Look at yourself. I know you lost your wife, but you have two boys to think about! What is the matter with you!" You growled as you tried to get up, but you were bleeding.

Your body was healing rather slowly, making you think your powers were still trying to recover. You didn't know how long it would take to be able to have them fully back, but you didn't care. His father was about to hurt you again when Kyojuro stopped him.

"Don't touch her again. I take full responsibility for all of her actions. I won't be back unless I find out you are hurting Senjuro again, and I suggest you read the letter I wrote. Let's take you to the butterfly mansion," he said as you started throwing up again, so he grabbed your hair and held it back, and he patted your back until you were somewhat done.

"I'm so sorry, you should go. This is disgusting, and I just ruined your relationship with your father," you said as his little brother was forced inside the house.

Rengoku's father watched as Kyojuro looked after you and noticed his worry as he saw your wounds weren't healing fast like how they used to. He was just like his mother, and it hurt, and you were so much like yours. Willing to do anything to keep people out of harm's way, a stubborn attitude, yet the kind heart you had and not thinking you were the best of the best. You never even got mad that he was angry you were a half-demon. You were mad because he disowned his son. You looked a lot like her, and that is what he also hated, then he found out who you were. You and Rengoku fought like you have fought together for years, and that final attack was beautiful. He couldn't deny you two had a lot of chemistry and worked well together, but you were a half-demon, and he was never going to accept you as anything else but a monster.

Rengoku gave you his cloak since you were shaking due to blood loss, and Senjuro was crying as he handed over the box to keep you safe from the sunlight. There was a tearful goodbye, and his brother waved with a smile on his face but proved he would be back soon, and he would send his crow to let him know.