It was right after Nezuko and Tanjiro worked together to defeat Rui. She declares for the sake of her older brother, "The bond that Tanjiro and I have, cannot be severed by anyone!" 

Rui's head was cut off, as Nezuko was mad of all the horrible things that he has done to her and her brother. 

She collapses on the floor, due from pure exhaustion from the fight she had, as the threads that hold Tanjiro collapses as well. 

He fell hard into the forest , as Nezuko was shaken with fear of her brother's well-being. 

"Oh , no! Tanjiro!" She exclaimed of seeing him unable to move. 

She said, "I did it. I actually won the fight. It's all thanks to Tanjiro, and the memory of our father showing me that Kagura dance that has been in our family generations. Although... I never expected I would be able to unleash that attack in the first place. I was just a kid when Dad showed it to me. " 

She tries to stand up, as her vision was blurry, making her uneasy to see where she was going. "What is going on? I... I .. can't see Tanjiro. " She thought, "Was it because I constantly using breaths this whole time?"

She groans of the blaring , as she closes her ears, "The ringing in my ears are brutal. I just can't stand it! 

Also, my whole body is filled with pain too! 

I have to heal up fast! There is absolutely no way I'm stopping! I'm not done fighting yet! Inosuke needs my help!" 

All of a sudden, the smell of Nezuko became intense as she gasps of it. 

"The smell... it's stronger than ever. Come to think of it, the demon didn't turn to ash like the other demons I've fought. 

Don't tell me..." She thought. 

The body of Rui was coming right behind her, she said, "You got to be kidding me?!? Even though I sliced the head off, it was able to move on its own?!!?"

Rui said, "You honestly think that you'll be able to defeat me that easily?" 

Rui retatch himself as Nezuko was trying to get to her brother, "You are really pathetic. I'll just kill you and your brother. " 

Nezuko thought, "Get up! Get up! Control your breathing!" 

Rui said, "I don't get it. How you not on fire when you unleashed that attack? It was me and the threads were caught on fire. 

I honestly don't know if that was your brother's power, but thanks for getting me annoyed by just thinking about it!" 

He dashes for her, as he unleashes his Blood Art again, as he said, "This is for everything you've done! Blood Demon Art, Murderous Eye Basket!" 

The Blood Demon Art was surrounding Nezuko as Nezuko thought, "Don't panic. Calm down, calm down! 

 I can't raise my sword right now! My arm wouldn't move! " 

As hope was lost, Giyu appears with his sword , as he cuts the Blood Art with ease, saving Nezuko. 

She felt the presence as she thought, "Someone is here. But it's not Zen , it's the familiar Breathing that I use, like Sensei had taught me. But who is it?"

Giyu said to her, "You did an excellent job of holding this demon off until I came along. You're lucky to be alive.

Leave this demon to me." 

She realizes who the voice was as she exclaimed, "Big Brother Giyu?" 

Rui said, "You're like an endless stream of lowlife that always get in my way!  Blood Demon Art, Cutting Thread Rotation!" 

But Giyu had a comeback attack, "Total Contraction, Water Breathing, Eleventh Form, Dead Calm." 

Nezuko couldn't believe what she just heard. "No way! Not only he can use the same technique I do, but there's also an Eleventh Form too?!? 

Geez, sensei, you didn't tell me that Water Breathing has eleven forms!" 

Rui yells, "Who cares about your Eleventh Form?!?"

As the Blood Demon Art came to Giyu, it didn't do a thing to him as the threads were slashed off with total ease. 

"What? What- What's going on?" He thought, "The moment I unleash the Blood Demon Art, it was slashed to pieces. " 

"No way! That seems impossible! " As Rui was about to attack, Giyu didn't hesitant as he walks up to him and sliced off his neck. 

Meanwhile, the girl demon thought as she was panicking and running through the forest, "I messed up! I messed up big time! 

And I was the only one who doesn't messed up until now in this "pretend family" game!" 

She had a flashback when she met Rui, and it affected her life. 

She refused to give up as she spotted Murata . 

He said, "A demon!" 

But he was unable to defend himself, as she wraps him into a ball. 

"What the! Let me out!" He yelled inside the ball as the girl chuckles, "It's no use of cutting it. " 

As she was unexpected by Kacho said, "Amazing, so , that's how you did it . I'm impressed by you using your threads by your palm." 

The girl demon was shook by her sudden appearance. "It's a wonderful evening, isn't?" 

The girl demon heisants by her as she attacks her, but Kacho manages to dodge all of them. 

She attacks the demon as she said, "I can see very clearly that you don't want to be my friend. Oh well, I least I tried. " 

The demon said, "You vengeful witch! Die!" 

Kocho sighs of the demon girl, as she unleashed her breathing technique, "Insect Breathing, Butterfly Dance Caprice." 

The demon girl was poisoned as she said, "You shouldn't underestimate me. I'm Kocho Shinobu,  a Demon Insect Hashira." 

She freed Murata. "Are you all right?"

"What took you so long?" Murata asks, as he saw the dead demon. "Don't tell me you finished it off?"

"Is that a problem?" She asks as Murata waves his hands, "Awe , no! I'm grateful for the help, I didn't suspect anyone from the Demon Crops would come here on their own! " 

He felt totally embrassed as he looked down to see he was naked, as Kocho chuckles, "I think that Giyu had beaten me to it as would expected. Geez, he's such a character." 

Nezuko goes to her brother slowly. "T-Tanjiro. " She said. 

Rui thought, "I'll kill those siblings no matter what it takes!" 

But to his amazement, he sees Nezuko holding onto her brother, as true siblings would be as he was watching them as Nezuko was holding onto her brother tightly. 

"Tanjiro, I'm so sorry! I didn't want you to get hurt like this." She said to the demon boy.