What if Tanjiro was a Pure Saiyan? (DB X KNY)

Rarest of the Rare Marechi

"Allow me to turn you into a demon so you can be of use to that man."

"A descendant of my own cells...is something I never imagined... it moves my heart. Yes...there is nothing to fear. If it's about your arm... you can grow it back once you become a demon... I am the only Upper Moon who can fight properly at this point...and I believe that man...should also welcome you..." Kokushibo raises his arms at Muichiro while adding, "Let me...stop the bleeding... Humans are brittle... But if you did from losing too much blood..." Genya was around a corner looking at the encounter ahead as Kokushibo said, "Or if that man doesn't accept you...and you die...then death is your only fate...thus, it means that you are a man who can only go so far..." Genta points his double-barrel shotgun at Kokushibo but heard an impact in front of him. He then heard Kokushibo say behind him, "Don't you think so...as well?" Genya begins to sweat bullets while his forearm begins to disconnect from his shoulder. Muichiro screamed, "Genya!!" Muichiro also begins to push his sword out of his body while Genya immediately grabs a blade from his back but that was cut off by Kokushibo. Genya yells as Kokushibo said, "Hm... I see... So you've been eating demons, huh?" Kokushibo delivers a slash to Genya's torso, causing his upper body to land a few centimetres above his lower body. Muichiro gasps and thought, "Can't pull it...! Dammit!! I can't pull it out!!" Kokushibo looked at Genya and said, "Oh. You aren't dead yet... Even though your torso has been sliced in half... Around three hundred years ago...there was a swordsman who ate demons just like you... he died when I sliced his body... So perhaps for you, it's your head...? I have no reason...to let a fake demon like you live..." Kokushibo unsheathes his demonic blade while Genya thought in a panic, "Crawl!! Put my arms back on!!" Kokushibo's crescent attack reaches Genya but was completely nullified by,

"Wind Breathing, Fourth Form: Rising Dust Storm!"

Sanemi saves Genya and caused Kokushibo to slide back. He says to himself, "The wind Pillar..." Sanemi said, "You got that right. I am the Wind that'll Rio your head off, shitface." Genya whispered, "Aniki." Sanemi said to Genya, "...I'm being serious here. You really are one pathetic little brother. Why do you think I went as far as killing our own mother? Because I wanted to protect you!"

- Tanjiro to Genya -
"I know the Wind Pillar is your brother and all, but about him, Genya. He got really mad about you joining the Demon Slayers, but I didn't smell a tinge of hatred in him. So you don't need to be afraid of him. If you wanted to say something, go ahead. It should be fine. Because Sanemi-san has loved you all this time, Genya."

- With the Battle -
Sanemi continued, "You should've gotten married, had some goddamn kids, and lived until you became an old geezer. For all the times I couldn't do a thing for Kaa-san, and for all the times we couldn't do a thing for our little siblings, you should have made your goddamn wife and kids as happy as they would've been. Because I would've made sure that no demon would be heading your way..." Genya begins to cry and said, "Sorry Nii-chan... I'm so sorry..." Kokushibo held his blade and said, "Huh... Demon Slayer brothers... How nostalgic..." Sanemi screams, "How dare you size my little brother up, you fuck-eyed bastard! You're dead! Dead! Unforgivable!!" Sanemi begins running at Kokushibo while he tries to attack Sanemi. Sanemi then slid under Kokushibo to try and slash his legs. Genya thought, "Below!! He's going under his feet..." Kokushibo jumps over but Sanemi responds by using,

"First Form: Dust Whirlwind Cutter!"

Sanemi sent an attack straight to Kokushibo but missed. Kokushibo then drew his blade just to block Sanemi's attack. Muichiro thought, "He drew...his sword!!" Sanemi laughs and said, "Huuh! Would you look at that? That is one ugly-looking blade, am I right!?" Kokushibo's blade grew an intense aura. He then begins to push on Sanemi's blade while using,

"Moon Breathing, Fifth Form: Moon Spirit Calamitous Eddy!"

Sanemi hops back and was completely missed by the attack. A lot of crescent attacks spun around the area with Sanemi skidding to a stop. Sanemi laughs and said, "You keep repeating those slashes without even swinging your blade." The two then lunge at each other with Sanemi using,

"Wind Breathing, Third Form: Clean Storm Wind Tree!"

Kokushibo slashed downward at Sanemi while releasing more crescent moon-like attacks. Both attacks clashed with a Kokushibo complimenting, "Not bad... I see your physical and body techniques...are at their peaks..." While fighting, Sanemi thought, "I can't stop getting goosebumps at this guy's skill. Every one of his slashes is surrounded by these chaotic blades. And they're always changing in length and size. There's no set form. I'm not surprised Tokito lost. I wanted to ward off this attack completely, but it's so strange and warped. It would be impossible to defend myself if I didn't have a ton of experience behind me. And his speed!" Kokushibo begins to exhale with Sanemi thinking, "And this guy's using breaths! A demon with unnaturally high regenerative and physical prowess is using breaths. And his power and speed are still climbing up!" Sanemi then lets out, "Fun...!! This is so much fun!! This is a demon worth killing!!" Sanemi raised his blade above his head and uses,

"Wind Breathing, Second Form: Claws-Purifying Wind!"

Sanemi brought his blade down and four attacks reaches Kokushibo, but he blocked them with his blade. Kokushibo pushes the attack back and redirects it elsewhere. Sanemi surprises Kokushibo by jumping appearing from the air. Kokushibo quickly blocks Sanemi's blade but was nearly met with another blade to his chin. The extra blade was carried by Sanemi's foot. But much to Sanemi's surprise, Kokushibo brings his head back really fast. Genya thought, "My sword...!!" Kokushibo quickly slashed at Sanemi but Sanemi attacked at the same time to block Kokushibo's attack. Kokushibo thought, "Huh... He's still...keeping up...with my technique... What a nostalgic...feeling...so uplifting..." Kokushibo attacks Sanemi again but Sanemi wasn't able to keep up with it as he was cut by a few times by the crescent attacks. Muichiro yelled, "Shinazugawa-san!" Genya thought, "Aniki... Aniki!!" Sanemi also thought, "I can't even blink!! I was so close to dying just because I barely messed up the tip of my swing!!" Kokushibo said, "Long ago... It was...the Sengoku era...and this time...was the way I... Right... How the Wind Pillar and I...both improved our swordsmanship skills..." Kokushibo lets out a wide long-ranged attack by using,

"Moon Breathing, Sixth Form: Perpetual Night, Lonely Moon - Incessant!"

Sanemi was unfortunate enough to get overwhelmed by it and was cut many more times with everything around him falling apart. Genya thought in fear, "Aniki!! Aniki!! What happened!? What's happening!? Where is he!? Shit!! I can't see!! The Pillars and the latticework are..."
Sanemi begins to spill out a lot of blood with a few inhales and exhales coming from him. Kokushibo said, "Hm... You held out for quite some time...up to this point... But if you move, your organs...will spill out..." Kokushibo felt something and thought, "My pulse is increasing... What...?" Sanemi begins to choke out a laugh and said, "Cats to silvervine, demons to rare blood." Sanemi quickly slashed at Kokushibo with Kokushibo blocking but almost tripped on his feet. Sanemi yells, "Whoa, buddy. What's the problem? You're staggering there. Looks like my blood even works on the Upper Moon!! Demons get drunk once they get a whiff of my blood. And this blood's the rarest of the rare, once-in-a-lifetime shit! Now have a fucking feast!!"

Chapter 128: End.

- A Little Secret -
Nothing this time.

1349 words in total.