Half-Demon! Tanjiro AU

Chapter Three: The Spider's Old Stomping Grounds

Warnings: Just some blood.

Word Count: 2727

"Oh! Brother, I brought you your haori!" Nezuko chirped happily as she held up the green and black checkered cloth. The fabric was freshly washed and it smelled of sweet lavender. Tanjiro took in the soft scent. To him, this was a sign of relief and comfort. "Thank you, Nezuko."
The Kambako squad warmly watched the young slayer fiddle with his haori. The fabric struggled to fit over his new body, which made the young boy feel rather awkward. "I guess I'll have to adjust it, huh?" Nezuko awkwardly chuckled as Tanjiro looked at her, a nervous smile on his face.
Unfortunately, a throbbing pain struck the younger Kamado. She gripped her head and snarled in pain. Inosuke immediately went to her side and put an arm around her. The rest of the slayers looked worried, but not shocked. However, a look of concern spread across Tanjiro's face.
"What's wrong, Nezuko?!" Tanjiro tenderly approached his sister and crouched in front of her. "She's been having these spats where her demon side is fighting for control." Giyuu's voice was dim and worried. "Tamayo's medicine..is having some faults." Sanemi huffed irritably at Giyuu's words.
Tanjiro thought for a moment, looking at his hand. He is now the new Demon King, or at least the leader of this new group of creatures. Why wouldn't he be able to help her? Tanjiro looked at his beloved sister worriedly before cutting his hand open with his claws.
Everyone stood in disturbed shocked as Tanjiro let a few drops of his blood drip into the suffering demon's maw. "I hope this works.." Tanjiro muttered anxiously. Nezuko snapped her jaws shut, swallowed the blood and shook her head. Then it seemed like something had clicked within her.
She looked up at Tanjiro, both eyes being demon-like, then to the other group members. They all leaned in curiously, not knowing what was going on. Nezuko stared at her own claws before looking back up at her brother. She was smiling with no sense of bloodlust in her eyes. "Thank you, brother!"
The young demon hugged her brother tightly as the Kamaboko squad cheered. "So, are we just gonna let this happen?! How do we explain this?" Sanemi whispered harshly to Giyuu. Tomioka turns and shakes his head. "They aren't bloodthirsty, so I doubt there would be any argument, especially since they've done so much to help us."
Sanemi knew that the Water Piller knew what he was talking about, so he left it at that. "Come on, young Kamado." Giyuu said, warmly. "It's time you've come home." Tanjiro's eyes water a tad when he said this. Zenitsu clung to Tanjiro tightly as Inosuke and Kanao helped him up. "Thank you." Tanjiro mews in a sweet, honey-like tone. "Thank you so much."

To many amongst the corps, the return of the young, yet powerful slayer was worthy of celebration. Aoi and and young girls at the butterfly mansion celebrated with a massive feast, to which many slayers attended. Tanjiro couldn't help, but cry with everyone's love and affection.
Kiriya was rather curious, though, on how such a transformation was possible. He wasn't skeptical of Tanjiro's humanity in the slightest, but he wanted to understand his new form better. Within three days of the young slayer's return, Kiriya had sent a crow out to seek for him.
The large crow perched on the window of the Butterfly Mansion's kitchen, where Tanjiro was helping Aoi prepare for that day's dinner. "Young Kamado! Young Kamado! The Master requests for your presence! Caw!" Both Tanjiro and Aoi looked rather surprised."He wants to see me?" Tanjiro asked, confused.
"Oh yes he does! Caw!" The crow laughed rather oddly. Tanjiro thought about the request for a minute. "Well, I guess it does make sense." Aoi tapped his shoulder. "You might not want to be late, you know." Tanjiro blushed in embarrassment. "Right! I'll be on my way then! Have a good day, Aoi!" Tanjiro mews sweetly as he runs off. Aoi smiles softly, watching him. "I hope the same for you."
It didn't take long for Tanjiro to reach the Master's mansion. His new form increased his speed and endurance, which helped him get to the estate in less than five minutes. Once he got there, he knocked on the door. A male Kakushi answered the call. "Ah! Lord Kamado! You're here!" The Kakushi said warmly.
"Hello, Mister. I heard that the Master has requested for me?" Tanjiro tilted his head slightly. The Kakushi nodded calmly. "Right this way." He lead the young slayer through the Master's voluminous mansion. As Tanjiro passed the many areas that he became so familiar with, memories of Kagaya filled Tanjiro's mind. Thus, making him tear up.
"We're here." The Kakushi announcer politely. Tanjiro shook his head to shake off those thoughts. "Right! Thank you!" The Kakushi opened the door to the meeting room, letting Tanjiro inside.
Kiriya was sitting in front of two of his sisters, Nichika and Kanata. "Ah! Tanjiro! It's lovely seeing you again." Kiriya's face brightened as soon as he saw the boy. "Same goes for you, Master." Tanjiro sat on his knees in front of them. "Mind if I ask, why have you called me here?"
Kiriya closed his eyes before starting his speech. "I have brought you here because I'm curious what you are capable of in this new form. I don't mistrust your humanity, since you are showing no signs of bloodlust, but I'm curious as to what this new species entails."
Tanjiro's questions only grew as the boy spoke. Did he want him to train to find his Blood Demon Art? Did Kiriya want to perform experiments with his blood? Tanjiro had not a single clue. "What do you mean, Master?"
The boy gathered his thoughts to hopefully make more sense. "I request that you log any new abilities and information in your journal. That's really the best way we can discover more about this."
Tanjiro nodded with understanding. "I see. I will make sure to log everything, Master!" Tanjiro bows loyalty. "How should I try to go about this?" The young slayer tilted his head with curiosity.
Kiriya put a hand to his chin. "I'm not sure.." Kanata then shuffled closer to her brother and whispered to him. Kiriya looked intrigued by what she was saying and nodded slowly. "That sounds like a good idea." Kiriya hummed softly.
Tanjiro waited patiently for his orders, curious as to what they were talking about. Kiriya then looked up at him with a pleasant smile. "We would like you to go to where one of your old missions took place. That might give us some information."
Tanjiro nodded his head, agreeing with the suggestion. "That makes sense. My demon cells might react due to my past memories." Kiriya smiled. "Exactly. Could you bring your sister as well?" Tanjiro returned with a heavenly smile. "Of course! Is there anything else you need?"
"That's it, young Kamado. You are dismissed." Kiriya clapped his hands together. "Right! Thank you, Master!" Tanjiro stood up from the meeting and walked out, wondering what place he would decide to travel to.