(A/N): The votes have now been placed. I appreciate the reasoning behind the answers you all have inputted and taking their time to make it. I've been reading them in my spare time and I'm happy that knowing you all want her to be spared.

Sorry for the ones who wanted the canon option. Do note this is a fic, so not every event can be followed like in the anime. There will be many changes.

I'll be honest, I was intentional letting her get killed because of her killing questionable countless of humans in the past. While I may I seem I said in the previous that I was going to choose the Spare option, I just thought it would make a difference to the story.

But many of you seem to like it, and I very much feel thankful to you all for the reads and votes this story has been going. Your comments and the votes are what motivated, inspired and encouraged me to do more of these for you guys. I thank you all from the bottom of my heart.

Anyways, I was being sentimental for a moment there.

Please, enjoy and read.


It wasn't the time to be introspective but Fire needed to have his own thoughts sorted out. Surely, he had never even spared at least one demon before. Not once. Something about the Mother Spider Demon made him go into a state full of hesitancy and doubt. Was there really a demon that had expressed their feelings and thoughts out in their most vulnerable state? Fire seemed so. Since he had her cornered and everything, she felt that her hope and chance of escaping had been reduced to zero, and she immediately accepted her imminent demise.

But yet, Fire isn't bringing himself to do it. Now that counterclaims himself as his duty of being a Demon Slayer. Their duty was to slay demons and rescue people from various danger methods constructed by them, and nothing else but that objective alone. Fire never felt an upturn feeling in his stomach before, almost as if he wants to run away from here.

The demoness sat idle in her usual sitting place on the diagonally flat rock. Her eyes wandered all over the pyrokinetic and is confused why he isn't unsheathing his blade. There was something bothering him. She can tell by the look of uncertainty in his orange eyes.

"I'm sorry." His voice tone changed, no longer containing a hint of normality but in a form of disconsolateness. "I can't..."

"W-Why...?" Her voice rose. "Why is it you can't end my life? What made you reluctant about it?"

Fire bit his lip, not because he's nervous, but the anxious feeling is swirling deep in him.

"Surely, you killed many people before, but that's because you're forced to."

Her eyes widen.

"Not because you didn't acted upon your will, but it's because you are scared from the ones who you called family will continue to hurt you if you don't follow what they say, right?"

How did he find out? He must be lying to make her sympathize with him. But again, who is she to talk? She'd lied several times, all for the sake of survival.

But here, does she now have a reason to continue with the act? Once again, she did broke down in tears in front of him. So that option is off the table.

"Yes." A straight-forward and easy answer. "I don't want to because I had to. Otherwise, they'll just find more ways to torture me if don't do what they say."

Fire wondered. Who were the ones that made her scared the most? Of course it's her so-called family but he is interested to see who torments her the most?

"May I ask who this person is that... made you do all of this?"

Her lips quivered. At any moment, if she were to say the name, she's afraid when he'll come out of nowhere and possibly hurt her more if she utter his name. No matter how agonizing she really thought to herself, the more scared she'd become.

She wondered, can he free her from her place of hell?

"His name is... Rui." She whispered the last part to not make it too loud, but thanks to Fire's enhanced hearing sense, he heard it clearly.

"And I'm assuming he is the one that is in charge of the family?" Fire needed more clarification. She gestured her head in a mix of agreement and disagreement.

"There's also a really strong demon, with a spider for a face. I never knew his name, but we called him their father, my supposed-husband."

"So, a Father Spider Demon?"

She nodded.

"That's right."

She had no idea why he is stalling, or if he's actually stalling. He would easily kill her right then and there. Yet, Fire isn't bringing his sword out.

"Anything I need to know about this father you speak of?"

A question she wasn't expecting. Fire knew that her judgment is just as baffled right now, but he needed answers, answers to who they are dealing with. After this, he'll question more about this Rui demon.

She answered regardless. "He sheds his outer skin to gain a form even more destructive and powerful than his base form. But, his base form is just as strong like a powerhouse."

"So, a metamorphosis ability." Fire nodded. "What about this Rui person?"

She shuddered immensely. Fire noticed the sudden pause when he mentioned the boy's name. Perhaps it was him that made her terrified the most among the whole family?

"Rui... He's the one you should watch out the most..." Her tone shifts from somber to terror. "He'll kill you in an instant... if you provoke him in any way... His threads are steel-like, so you can't cut them in any means necessary... And also... He is one of the Twelve Kizuki... because that man shares his blood to Rui."

Fire gasped. A look of horror plastered onto Fire's face upon hearing this revelation. A Twelve Kizuki is here in the mountains, and the description she just told him is just so insane.

"I... I see." He said in a low voice. With this information, he can inform Tanjiro and the others of a powerful demon lurking around here thanks to her.

Speaking of her, Fire isn't done with her yet. He hadn't decided on the choice of mercy or death.

It seemed like an eternity with him with the demoness. He had no idea what to do but to do something about her. He can't just leave her there alone. He had made up his mind about not to trust any demons all because he knew they are just lying to keep themselves alive.

Curse his hearing senses for countering his assumptions. At least now he had no reason to kill her. She did gave him a concept on what they're dealing with. So for now, she's no longer a threat to Fire.

"I..."

Her gaze went back to him fully. "Hm?"

Fire briefly glanced his sword and shook his head, almost rambunctiously then looks back to her in the eyes.

"I'll let you go..."

It's probably the first time that she ever heard those words being said from no one but a Demon Slayer. Many questions ran in her perplexed mind.

"I know you have many questions as to why I'm saying this to you, but..." Fire looked behind him, and was surprised to see his other elemental partner, Earth, reacting to this whole scene with a shocked face.

"It's just that... I have a mission to complete... and I know you said you wanted to be free, so for this once, I'll be giving you another chance in life not as a demon, but another chance to live like a human again."

"But why?!" She exclaimed, her mind clouded with anger and confusion. "Why spare a demon such as me?! Why would you sympathize for a demon like me?! I'm a murderer! I killed the demon hunters in the forest with my threads! I killed many people in the past! It won't justify anything if you let me go! What if I decided to kill again in order to survive?! My family will keep abusing me if I kept living on like this! What then?! What purpose will I serve if I'm still alive for any longer! What—"

Fire flashed a smile at her, unfazed by her outburst. She quickly reserved her breath from her rage, and just looked at his calm smile.

"I'll free you from your family. I'll free you from your past. I'm only doing this because I want you to know and experience freedom like any other."

The Mother Spider Demon closed her mouth and brought up her hands neae her mouth and almost bawled. She had never met anyone as considerate as this child before in her life as a demon. The native humans that lived here in the mountain, when they saw her for the first time, they threw remarks at her, saying a being like her shouldn't exist in this world. She didn't want to kill them because then, her family would blame her for disturbing their peace of solitude if she did make a scene, but that soon was taken care of by Rui rounding them up and insta-kill them.

Her heart melted. The kind eyes Fire is piercing through her own had lighten what's inside her void of emptiness. Her tranquility had ceased to the point she can let herself become what she wants to be. Does she really want to reveal her true self to him? To her, it does not matter anymore. She knew she would trust him, but a shadow of a doubt still lingered around her.

Fire's eyes narrowed at her when she undergone a different change. Her voluptuous form was replaced by a child's body. He hadn't a moment to fathom what became of her. One moment she was a woman, then the next she became a toddler like being.

"This is... my true form." Her voice is replaced of that of a child to better fit her appearance. "Rui altered my body to fit myself as his mother... I don't know... on how to become a mother... I never knew what the role of a mother is... but Rui, whenever he sees me in this form, he'll string me up anywhere where the sun can hit me... and I'll die..."

She leaked more tears as she sat there, no longer in her alternate form. Fire approached cautiously, his heart piloting his movements than what his mind is telling him to do. Was it really all right if he do this to a demon? There's only one way to find out.

He hugged her.

Almost as if pulled by gravity, Fire knew what he was doing. She had suffered too long to know what true comfort even feels like. He assumed no one in her pretend family had ever shown a sign of affection towards this demon.

"What's your name?" Fire rubbed circles around her back. He never knew how scared she was when she trembled.

"My name..." She let herself relaxed and succumb to the embrace Fire had given her. "...Eiko Yukino."

(A/N): Since she officially didn't have a name, I dubbed her one.

Eiko = a prosperous child

Yukino = To be like snow; pure and innocent.

"I like it. It has a nice ring to it." Fire smiled and let go of the hug of what lasted to be forever. Now that he gotten closer with her, he can inspect her appearance. She no longer has silky silver hair but instead with short black hair parted to the side with bangs framing her face and two, low pigtails. Her skin was marked with two maroon lines on each of her cheeks and her eyes were rounder with yellow irises and x-shaped pupils.

"Stay here Eiko. I'll take care of your family and I'll come back for you." He promised with a smile on his face.

Eiko never felt so emotional before. It's the first time someone had truly care for her. Then when she heard that he'll come back for her makes her feel a new sense of hope swirling inside her. She smiled faintly, knowing that not everyone is as bad as a demon. There are still good people in this cruel world.

Little did she know, this world wasn't his own to begin with.

She tackled him once more in a hug. She wanted to feel the warmth of his body.

'He's warm like... the heat of the sun.' She thought. 'Since when was the last time I felt the sun's warmth?'

In the midst of their hug, her memories started to trickle in her head. She vaguely remembered a person who had embraced her just like Fire did to her moments ago. Eiko couldn't remember but she felt like that person is somehow related to her. She wondered how that person is doing now.

This brought her peace. A new sense of love she had been waiting for. She let go of the hug then looked back at the boy.

"By the way, I'm BoBoiBoy." He slightly cheered and told her his real name and not his elemental name, lest he wants to confuse her. Her eyes shined at him. So this is the person that she felt the warmth on her fingertips a while ago.

"BoBoiBoy, can I... ask you something?"

Fire knew she is still suspecting him of his motives, but his motives are as clear as day. But if there's something she needed to know, Fire gives her the right to know.

"Why are you helping me?"

Fire answered quickly.

"Because it's the right thing to do."

Afterwards, he walked away from the scene, leaving her to wonder in thought as she watched him leave to join up with the others.

'Can I really believe him...? Can he really release me from my pain and suffering...?'

Eiko no longer had to lie for herself now. She can finally calm down because now, she entrusts his judgment for now. She then no longer have any intentions to kill more humans as she already did now. When she felt her threads burning, she knew that he did that in order to save the remaining ones who are alive.

It was this day that she'll able to do everything she can to fix her mistakes, even if it may seem painful for her to do. She stayed on her sitting place, awaiting for BoBoiBoy's return.

"Please... Be careful of them..." She whispered.

Earth watched the whole thing unraveling. He came to check up on Fire if he had done it with the demon already. It turns out Fire had done the opposite of what he thought. Earth saw Fire approaching him, an almost apathetic face shown.

"Let's go." A tone full of determination albeit for a brief moment.

Earth didn't question on that, but urged on to what just happened. Fire told him everything he replayed in the back of his mind.

"Do you think I did the right thing?" Fire said in a somber tone. "Was it all right? Did I just take a risk factor of sparing Eiko?"

Earth placed a reassuring hand on top of Fire's shoulder. Knowing that he shouldered the responsibility of letting the spider demon live, Earth needn't to berate him about it.

Fire nearly flinched from the unexpected contact. He looked over his shoulder to see Earth smiling at him. A simple gesture spoke many words and answers to Fire and he nearly let himself wail on it.

"You did good, Fire. I'm proud of you."


"So, did you defeat it?" Inosuke and Tanjiro had been waiting for Fire's return.

Fire didn't respond to his question. Instead, he stayed silent and his hair's bangs shadowed his eyes, causing Tanjiro to look at him with concern.

"Is he okay?" Tanjiro asked with concern.

"Give him some space." Earth replied.

"Some space?! What do you mean?!" Inosuke pushed on and got up in front of Fire's face. "I asked whether you defeated that thing or not!"

The last thing Fire needed right now is an attitude adjustment at this wild boar as he keeps pestering him non-stop. Having enough of this, he snapped and sharply glared at Inosuke with his flaming eyes burning in quiet rage. Inosuke backed down from seeing the monstrous glare. It sent shivers crawling up on his spine and didn't bother him again.

"Anyways, Tanjiro." Earth decided to break the tension feeling in the air. "Fire said there's a member of a Twelve Kizuki here in the mountains."

Tanjiro gasped and is now eager. "Here?! In the mountains?!"

Earth nodded. Tanjiro is feeling confident that he knows that a demon who is an equal to Muzan is finally here in the mountains.

"So, Inosuke, how are you feeling?" Earth swerved his attention to the boar.

"Don't go showering me with your sensitivity and kindness!" Inosuke reverted back to his own self, fully forgetting what Fire did to him.

"You hear me? Got that? After all, anything you all can do, I can do, too but even better! Before you know it, my head will be harder than Gengoro's. Not to mention... Not to mention... Um..."

Earth and Tanjiro heard him growing tired. His injuries were the cause of his fatigue to grow at a fast rate.

"He's hurt pretty badly." He whispered to Tanjiro. Earth sees him getting a spare cloth hidden underneath his haori.

"If Fire hadn't arrived earlier to save the people in the forest, I wouldn't want to imagine the pained faces of the Demon Slayers if they're killed." Tanjiro appreciated. Leaving him to bandage up Inosuke, which he refuses for Tanjiro's help, Earth sat down with Fire, who is sitting on a nearby tree.

"You can talk to me, Fire. If there's something on your mind, you can tell me." He said like he is his own brother.

Fire side glanced at him before letting out a sigh.

"Eiko gave off a sound of terror and suffering that's enough to make her yearn for death." Fire said in a low tone. "I wish I can help her more, y'know."

"You did what you could." Earth can only hugged him for respite. It's what he needs right now.

"Thanks Earth." Fire smiled. With the sounds of the two boys shouting at each other in the background, he needs this sort of moment to take a break and let the sounds enter his mind.

'This reminds me...' Earth wondered deeply in his thoughts with Fire leaning on his shoulder. 'Demons shouldn't be able to band together, right? I wonder how long they've been here in this mountain. It could be for an eternity or a millenial for all I know.'

It isn't the most comfortable place for them to rest, but it's better than nothing. Fire succumbed to his exhaustion and rested fully on Earth's body, using it as his leaning support. Earth didn't mind at all. The poor boy had done all the work he can do for now.

Tanjiro and Inosuke calmed down after failing to medicate Inosuke's injuries and he crossed his arms with smoke exhaling out of his mask's nostrils. Tanjiro sat on a nearby rock, contemplating on their situation related to a Twelve Kizuki.

Little do they know, their night is about to go hellacious at a convenient time and place, as with two certain lost Demon Slayers in the forest.


I feel like I wrote horribly on this, but I'm not sure. I wasn't at my finest mood today and hope I didn't butcher this short chapter.

I'll assure you all that the next one will continue with Zenitsu and Water. Now, I'm not sure if I can do this one, but have I ever done enough to deserve all the love for our thunder boi?

'Cause he deserved it. :D

Once again, thank you guys for your support for this cross-over. I never wouldn't have gotten this far without your guys' support. Seriously, I don't deserve any of you all.

I'm being sentimental again, am I not? Geez, I gotta stop reading too much angst xD

~ see y'all next chapter