Note: Hello, I'm here to say that the user alphaprince0 gave me these questions:
I have several questions/suggestions
(1) why didn't Muramasa gain any skills when he arrived in Tensura? I think he should have gotten skills related to blacksmithing and swordsmanship
(2) can you Muramasa become a Demon Lord alongside Rimuru? I think it would be interesting
(3) can you please add others into their relationship to make it polyamory? I was thinking you could at least add Milim Nava, Luminous Valentine, Testarossa, and maybe Velgrynd or Velzard
I only show his questions, but I was already answering with him privately. Giving my answers as well as continuing to expand the harem, but the truth, I was only interested in Muramasa x Rimuru x Ciel. So I won't do that. But question two is a bit interesting to me, to turn Muramasa into a Demon Lord. The truth is that he had not planned to turn Muramasa into a Demon Lord, he was only thinking of a drama where Muramasa feels that his body is called, since as he is a Heroic Spirit someone should be summoning him, giving to the next plot that would be that Rimuru becomes his Master.
I only leave this as important details as well as showing the story I was thinking, but I can leave it up to you to choose whether Rimuru becomes your Master or Muramasa becomes a Demon Lord, being together with Rimuru and Ciel can already be said for thousands of years.
Chapter 2
The morning sun filtered through the windows of the forge, illuminating the carefully arranged tools and finished swords, spears, and armor that awaited their owners. Muramasa, as usual, was focused on his work. With precise movements, the hammer struck the red-hot metal, molding a new blade. Customers came and went, some picking up their orders, others leaving new orders.
Everything seemed to be just another day in the blacksmith's life, until a familiar voice burst into the tranquility.
"Muramasa! Let me hide here, please!"
Muramasa looked up, meeting Rimuru, who was hurrying into the forge. She was wearing an outfit that, although surprising, did not manage to alter his usual indifferent expression. It was a bunny suit, with long black ears, a tight corset and a short skirt. Rimuru gasped as she tried to catch her breath, her eyes showing a mixture of frustration and embarrassment.
Muramasa watched the scene calmly, setting his hammer down on the table. Finally, he asked, "What are you doing here dressed like this?"
"There is no time for explanations! Just tell me if I can hide," Rimuru replied, nervously, looking at the door as if expecting someone to appear at any moment.
Muramasa, with the same serenity as always, pointed to a door at the back of the forge." You can hide in the tool and mineral storage, but I don't think it will do much good. The person you're escaping from will probably find you the same."
"Thank you!" shouted Rimuru before running towards the warehouse, completely ignoring Muramasa's warning.
Muramasa followed her with his eyes for a moment before returning to his work. However, it wasn't long before the forge door opened again, this time more delicately.
A young woman with long pink hair, dressed in an impeccable traditional miko costume, entered with elegant steps. Her eyes the same color as her hair shone with determination, and long, thin horns on her forehead indicated that she was of the oni race, just like Kurobe. In her hands she held a perfectly folded set of clothes.
Muramasa stopped working, studying it calmly. The young woman bowed slightly in respect before speaking.
"Excuse me, are you Muramasa-sama?"
"Only Muramasa," he corrected in a neutral voice. "Who are you?"
"My name is Shuna, and I am looking for Rimuru-sama." Shuna lifted the outfit she was wearing, proudly showing off the delicate tailoring. "I'm trying out some designs, and this is the next outfit I want her to wear."
Muramasa stared at the ensemble for a moment, wondering what kind of design it would be if Rimuru had already arrived dressed as a bunny.
"I don't know what you're talking about, but that person isn't here."
Shuna tilted her head slightly, a calm smile appearing on her face.
"Are you sure? Rimuru-sama is quite cunning, but her energy is easy to track. I think it's close."
Muramasa, keeping his expression impassive, simply shrugged.
"Do what you want. If it's here, you'll find it."
❈•≫────≪•◦ ❈ ◦•≫────≪•❈
Rimuru entered the small warehouse of the forge, carefully closing the door behind her as she tried to calm down. The place was dark, with shelves full of tools, minerals, and other ironwork materials stacked neatly. Despite the discomfort of the bunny costume, she plopped into a corner behind a barrel, making sure to stay out of sight of anyone who might enter.
"This is ridiculous...", she murmured mentally, as she tried to adjust the skirt of her suit to cover herself better.
'Rimuru-sama, this place is not the most efficient place to hide. According to my calculations, there is an 85% chance that Shuna will find you here.'
Rimuru sighed, closing her eyes as she tried not to lose her patience.
"Ciel, can you for once not analyze everything?! Just let me hide in peace."
'Understood, Rimuru-sama. I will keep silent.'
The silence lasted only a few seconds before Rimuru felt anything. A slight vibration in the air, like a magical trail extending from its location. Her eyes widened as she looked around, alarmed.
"Wait, what was that?"
'I have released a small magic signal,' Ciel replied in her logical and collected tone.
"What did you do?! She was supposed to be hidden from Shuna!"
Ciel remained silent without giving her a clear answer.
Rimuru put her hands to her face, her frustration growing rapidly.
"Ciel, traitor! What part of 'let me hide' didn't you understand?"
Before Ciel could answer, the door of the warehouse slammed open, and there was Shuna, smiling sweetly as she held a perfectly folded outfit.
"Rimuru-sama, I knew I would find you!"
"Shuna!" shouted Rimuru, her voice finally audible, as she tried to retreat further against the wall. "This is not fair!"
Shuna walked in with firm but graceful steps, her eyes shining with determination.
"Come on, Rimuru-sama, it's time for you to try on the next outfit. I'm sure this one will fit you perfectly."
Rimuru looked toward the door, considering for a moment whether she could escape, but Shuna blocked her exit with ease.
"Ciel! This is your fault!" exclaimed Rimuru in her mind as Shuna advanced towards her.
'I don't consider it my fault, Rimuru-sama. It's all for the sake of data collection.'
Rimuru could only let out a resigned sigh as Shuna dragged her out of the warehouse, giving her no time to protest. The next scene was a whirlwind of weaving, bowing, and adjustments. Despite Rimuru's attempts to resist, Shuna had quickly dressed her in a new outfit: a traditional miko outfit, but altered in a daring way, with a skirt that barely reached her thighs, leaving her slender legs completely exposed.
"Shuna! What is this? Why is the skirt so short?" demanded Rimuru, tugging at the fabric in a futile attempt to cover herself further.
"It's a special design to highlight your figure, Rimuru-sama," Shuna replied with an innocent smile as she took a step away to admire her work. "I think it fits you perfectly."
Rimuru frowned, completely indignant. Meanwhile, Muramasa, who was still working on his assignment, looked up briefly at the scene. His gaze assessed the situation with the same calm as always. He watched Rimuru in his new attire, his slender legs exposed, and then turned his attention back to the metal on the anvil, indifferent to the chaos unfolding in front of him.
"Muramasa! Say something! This is ridiculous!" shouted Rimuru as she tried to get rid of Shuna, who was trying to adjust the last details of the suit.
Muramasa did not answer. With a slight snort, he simply kept hammering the sword that he was to hand over later. Rimuru, frustrated, took advantage of Shuna's carelessness to run away from the forge, still dressed in the daring miko costume.
"Rimuru-sama! Wait!" exclaimed Shuna, following quickly.
From Rimuru's mind, Ciel had observed the entire interaction, recording every detail. Her attention, however, was not on Rimuru or Shuna, but on Muramasa.
"Analyzing emotional reaction... Result: No alteration detected."
Ciel processed the data accurately. Despite the scene in front of him, Muramasa did not show any physical or emotional changes. There was no acceleration in his heart rate or variations in his behavior.
"Hypothesis: The subject does not seem to respond to visual stimuli typically considered provocative. This raises the possibility that their interest in such stimuli is nil."
Ciel thought for a few moments, processing the idea. "If the subject does not show reactions even to moderate stimuli, what would happen in a more extreme situation? Would a woman's naked body bring about any detectable change?"
The thought settled in her logic as an unknown that needed to be resolved. It was a fascinating mystery. Determined to investigate further, she deliberately allowed Shuna to find Rimuru earlier, as a preliminary step in her experiment. But now, I had to take it to the next level.
❈•≫────≪•◦ ❈ ◦•≫────≪•❈
Hours later, the forge was in complete silence. Muramasa, after having delivered his commission, had retired to his house. After a relaxing bath, he had put on a simple dark blue kimono, her still-damp hair falling into disarray. As he prepared to rest, he felt a faint presence in the next room.
Frowning, he headed over there with calm but firm steps. As he entered, his eyes fell on the figure of Ciel, who was standing in the middle of the room. She was completely naked, her pale skin glistening in the dim candlelight.
Muramasa stopped, his face showing a faint hint of exasperation. For a few seconds, he watched her as calmly as if he were evaluating a newly forged sword. Finally, he broke the silence." What are you doing?"
Ciel tilted her head slightly, her logical, cold tone filling the space. "This is an experiment. I'm analyzing whether exposure to an extreme stimulus causes an emotional or physical reaction in you. So far, the data collected shows that you are a fascinating anomaly."
Muramasa let out a slight sigh, putting a hand to his forehead. Without saying more, he walked to a nearby shelf and pulled out his white kimono with an interior decorated with floral motifs. He walked over to Ciel and, with careful movements, pulled the kimono over her shoulders, covering her completely.
"Stop doing such absurd things," he said in a dry but firm tone. "I'm not your object of study."
Ciel looked him straight in the eye, showing no embarrassment or discomfort. "You are the test subject in this case. Your answers are interesting. There has been no detectable change."
Muramasa looked away, shaking his head. "I don't have time for these things. If you're done with your experiment, leave."
Ciel nodded slightly, adjusting the kimono Muramasa had placed over her. "Got it. I will continue my analyses later."
Without waiting any longer, Ciel vanished into thin air, leaving Muramasa alone in the room. After a long sigh, he sat down by the table and drank a cup of tea which he had prepared earlier.
"First Rimuru and Shuna, now this..." He muttered to himself, looking at the liquid in the cup. "This world is getting stranger and stranger."
❈•≫────≪•◦ ❈ ◦•≫────≪•❈
Inside the mansion, Ciel walked with soft, almost ethereal steps, her figure wrapped in the white kimono that Muramasa had placed on her shoulders. Her face, as always, showed a stoic, unalterable expression, while her mind worked tirelessly, analyzing the recent event he had caused.
"Muramasa..."
Her logical tone echoed in her mind, going over every detail. She had projected multiple hypotheses before presenting himself to him, all based on common emotional and physical stimuli. However, the final result left her perplexed.
"The subject showed no discomfort, surprise or physical alteration. Instead, he reacted with a functional action: covering me with this kimono. Unexpected variable."
Ciel looked down at the kimono he was now wearing. The fabric was soft to the touch, with a simple yet refined design. She ran her fingers over the floral details inside, watching them closely. Muramasa had chosen a practical object, and yet his choice contained a touch of care that did not fit with his apparent indifference.
"Why cover me? Action was not necessary for him. Was it a moral reflex? Or just a quick fix to end the situation?"
She stopped by a window, from where she could look out over the garden outside. The light of the mansion blended with the silvery glow of the moon, illuminating the flowers and trees that moved in the night breeze. At that moment, Ciel reflected on something he did not usually consider: human actions that could not be analyzed under a strict logic.
"If his emotions are as stable as my analyses suggest, could he be acting from a set of non-measurable values? Or is it just... different from others?"
Her gaze remained fixed on the garden while her mind was immersed in the enigma that Muramasa represented. For someone like Ciel, whose existence revolved around calculation and precise observation, finding something or someone that challenged her understanding was, in a way, fascinating.
"Muramasa..." she muttered, pronouncing the name softly, as if trying to crack a complex code.
The sound of her voice was lost in the quiet of the hallway. Without altering her expression, Ciel adjusted her kimono once more and resumed her march, her figure slowly disappearing into the depth of the mansion.
❈•≫────≪•◦ ❈ ◦•≫────≪•❈
In the mansion of Tempest City, Rimuru was mired in a seemingly endless pile of documents. Organizing the kingdom's operations, approving resources for different projects, and making sure that each department was in order were tasks that, although necessary, were still tedious. Rimuru sighed as he signed the last scroll of the morning.
"Finally..." she murmured, dropping her pen and stretching out in her chair. "Some more and my brain was going to melt."
Ciel, as always, remained in her mind, watching in silence. This time, however, her presence felt slightly different. It didn't take long for Rimuru to realize why.
"Ciel, what is that?" asked Rimuru, looking up at Ciel's projected figure in front of her. Ciel, as usual, wore her appearance with the 'double body' ability, with one small difference: on her shoulders rested a white kimono adorned with intricate floral patterns on its inner lining.
The contrast between the kimono's elegant design and Ciel's calm, expressionless expression was curious, but what caught Rimuru's attention most was the detail that she had never seen Ciel wear anything like this before.
"This kimono..." Rimuru began, frowning, "...where did you get it?"
Ciel tilted her head slightly, as if assessing whether it was worth answering. Finally, in her usually calm and direct tone, she said, "It's a personal gift."
The answer was simple, but the impact on Rimuru was immediate.
"A personal gift?" repeated Rimuru, rising from her seat. "From whom?"
Ciel, noticing the slight increase in Rimuru's heart rate, decided to continue with her explanation. "From Muramasa. He recently handed it to me."
The words echoed in the room, leaving Rimuru completely motionless for an instant.
"What!?" she finally exclaimed, looking at Ciel with a mixture of disbelief and surprise. "Why would Muramasa give you a kimono? That doesn't make any sense!"
Ciel kept her expression calm, as if Rimuru's reaction was not at all unexpected. "It was the result of an experiment," she replied calmly, intentionally omitting important details.
"An experiment?" Rimuru cocked her head, her tone heavy with confusion. "What kind of experiment would you do with Muramasa that would end with him giving you such an elegant kimono?"
"A simple test," Ciel replied, adjusting the kimono slightly on her shoulders. "I wanted to evaluate how Muramasa would respond to certain social interactions. The conclusion was satisfactory."
Rimuru put a hand to her forehead, feeling her patience begin to wear thin. "Ciel, could you stop talking like you're a machine for a second? What exactly did you do?"
Ciel tilted her head again, as if the question was irrelevant. "I only evaluated how Muramasa would react to an indirect request. The result was this kimono. It's a functional object, and he considered it a fitting gift."
"Indirect request?" Rimuru gritted her teeth. "What kind of request did you make?"
Ciel was silent for a moment, as if she was considering whether it was worth revealing more information. Finally, she replied, "I simply expressed interest in his clothing. It was enough for him to give me this kimono."
"That doesn't explain anything!" protested Rimuru, waving her arms in frustration.
However, Ciel's unwavering calm seemed only to intensify Rimuru's irritation.
"Wait a second..." Rimuru folded her arms, her mind beginning to connect the dots. "That kimono... it's exactly the same as the one Muramasa always uses, isn't it?"
"Correct," Ciel confirmed.
"Then why did he give you something so personal?"
Ciel, noticing Rimuru's increased heart rate and elevated tone, decided to analyze the situation from a logical perspective. Although she didn't fully understand human emotions, she was clear on one thing: Rimuru was upset.
(Reason for the irritation? Probably an emotional reaction related to jealousy or frustration. Hypothesis: Rimuru-sama does not understand why she did not receive a similar gift.)
"It's possible that Muramasa gave it to me for practical reasons," Ciel remarked, her tone as cold as ever. "Maybe he felt that, being a part of you, this kimono would be a gift that you could also share indirectly."
"That doesn't make any sense!" exclaimed Rimuru, clearly affected by the situation.
"It is a valid theory," Ciel replied.
Rimuru snorted, slumping back in her chair as he crossed her arms. "I don't understand it... Why would I do something like that? Muramasa doesn't seem to be the type to give gifts lightly. And least of all someone like you!"
Ciel, undeterred, simply adjusted the kimono again, as if the issue was already settled.
Silence lengthened in the room as Rimuru tried to calm himself. However, her mind kept spinning at the same point. Why had Muramasa decided to give Ciel such a special gift? And why did Ciel wear it so naturally, as if it meant nothing?
Finally, Rimuru leaned forward, pointing her finger at Ciel. "I'm going to ask Muramasa directly about this. I don't believe for a second that kimono is just a casual gesture. There has to be something else!"
Ciel bowed her head slightly. "As you wish, Rimuru-sama. Although I must point out that this emotional reaction seems disproportionate to the situation."
"It's not disproportionate!" replied Rimuru, although her tone betrayed a certain insecurity. "It's... It's strange, that's all. And I want answers."
Ciel remained silent, though her thoughts continued to process the situation.
(Conclusion: human emotions, although confusing, are considerably interesting. This level of reaction seems to indicate an emotional attachment to Muramasa, although Rimuru-sama probably does not recognize it yet.)
Rimuru was still sitting in her chair, her arms crossed, her thoughts swirling again and again around the subject of Ciel's kimono. Although she had decided to confront Muramasa directly later, uncertainty continued to haunt her, annoying her like a mosquito that she could not scare away.
However, before she could dive deeper into her frustration, a rumble echoed from outside the mansion, followed by an unmistakable scream.
"RIMURU! GET OUT OF THERE!"
Milim Nava's high-pitched, energetic scream echoed throughout Tempest City, causing Rimuru to nearly fall from her chair.
"What the hell...?" Rimuru murmured, blinking in surprise.
Before I could process what was occurring, the door of the room slammed open, and a small but imposing figure appeared in the frame. Milim, with her characteristic pink hair and bright eyes full of enthusiasm, entered like a hurricane, without waiting for an invitation.
"There you are! What are you doing locked up here like a boring woman?" demanded Milim, pointing an accusing finger at Rimuru. "Let's have fun! I order you to take a break!"
Rimuru let out a long sigh, dropping her head on the back of her chair. "Milim, I'm working. I have important things to do, you know? Ruling a kingdom is not as easy as it seems."
"Excuses!" cried Milim, quickly approaching and grabbing Rimuru by the arm. "You're always working. You have to have fun once in a while or you'll end up becoming a bitter old woman! Do you want that?"
"A bitter old woman?" Rimuru blinked, offended. "Where did you get that? I'm a slime! I don't even get old."
"Then you have no excuses!" replied Milim with a triumphant smile. "Come on, I won't take 'no' for an answer."
In the midst of the chaos that Milim had brought with her, Ciel remained as serene as ever, watching the scene from her position.
(Unexpected arrival of Milim Nava. High energy. Objective: to disrupt the current activities of Rimuru-sama and promote recreational activities. Evaluation: positive. This interaction might divert Rimuru-sama from her recent conflicting emotions.)
Although she didn't say anything out loud, Ciel couldn't help but notice how Mim's presence seemed to immediately change Rimuru's mood. Although still somewhat annoyed, Rimuru was no longer caught up in her thoughts about Muramasa and the kimono.
(Interesting. The arrival of Milim Nava has an immediate impact on Rimuru-sama's emotional state. The ability of social interactions to influence human emotions is remarkable.)
Rimuru tried to protest a little more, but Mim's insistence was like an insurmountable wall. Finally, she raised his hands in surrender.
"Okay, okay," Rimuru said, standing up. "Better to go out with you than to keep thinking about useless things."
"Exactly! I knew you would understand," Milim said with a big smile as she pulled Rimuru's hand toward the door.
"But we're not going to do anything crazy, understand?" Rimuru warned, following her with resignation. "Just something quiet to clear my head a bit."
"Of course, of course! Nothing crazy, I promise," Milim replied in a nonchalant tone, though the mischievous smile on her face said otherwise.
As the two of them left the mansion, Rimuru let Mim's enthusiasm drag her away, silently thanking the opportunity to distract herself. The emotions she had been feeling before were slowly beginning to fade, replaced by the expectation of what Milim had planned.
In her mind, Ciel watched silently, satisfied with the turn of events.
(Conclusion: Social interaction has successfully diverted Rimuru-sama's attention from her conflicting emotions. However, emotional attachment to Muramasa is still a relevant factor. I will continue to observe.)
With those reflections, Rimuru's day took an unexpected turn, but perhaps, just what she needed.
With the arrival of Milim, Rimuru's emotional tension was temporarily relieved. However, in the back of her mind, questions about Muramasa and the strange gift to Ciel were still latent, waiting for the right moment to resurface.