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

The unnamed swordsman

"I'm so sorry I couldn't save you"

-Tanjiro's POV-
"If only I could help Nezuko at least." I thought as I try to keep Nezuko off of me. "But she's too strong for me to hold back." I start to push Nezuko back a bit and try to reason with her. I yell, "Nezuko! Hang in there, Nezuko! Don't give in! You gotta hang in there!" As I am yelling I feel a presence making its way to us. "Don't turn into a demon! You gotta stay strong! Hang in there! Hang in there!" I finish. I feel a warm droplet on my face and notice Nezuko is crying. I feel the presence has gotten too close to us. I saw a man with a sword in the air. I instinctively grab Nezuko's neck way before he goes too close to us.

(A/N: Tanjiro *DOES NOT* look like how he does in the demon slayer anime. He looks like Goku. But Tanjiro never got his hair cut since he is a Saiyan.)

-Unnamed swordsman POV (very short pov)-
"The boy dodged my sword along with the demon. He seems fast." I thought. "Why did you protect it?" I asked the boy.

-Tanjiro's POV-
I protect Nezuko from whoever that may be. I also notice that Nezuko has gotten smaller in her original state. "What the.." I thought. The man looks toward us with a calm, yet stern expression, "who's that?" I ask myself. He looks towards us and I say, "A sword." The man asks me, "Why are you protecting it?" "She's my sister. She's my younger sister." I answer the man. Nezuko keeps growling and thrashing and my grasp, "Nezuko!" I yell. "You call that thing you sister?" He says. It goes quiet after a while, all while Nezuko keeps growling. After a few seconds, the man charged at me so fast, that I was barely able to keep hold of Nezuko. I bow down to protect her, but she's gone. I look around to see her in the man's grasp. I get while saying, "Nezuko!". The man tells me, "Don't move." The wind picks up interfering with my vision. I was able to see them both after a while. "My job is to slay demons. Needles to say, I'm going to decapitate your sister." The man said. I yell, "Hold on! Nezuko hasn't killed anyone! Back at my house, there was another scent I'd never smelled before! That's probably the one who killed my family! It wasn't Nezuko," While I say that, Nezuko is still thrashing around and growling. "I don't know why she turned into something like that, but... but still..." I finish. "It's quite simple. Because her wounds were exposed to demon blood, she turned into a demon. That's how man-eating demons multiply." The man pipes in. I then say, "Nezuko would never eat humans." "You got to be kidding me. Just now, you were about to be devoured." The man said. "You're wrong! I'm sure she knows who I am! I won't let her hurt anyone! I'm going to turn Nezuko back into a human! I swear I'll heal her!" I yelled. Nezuko continues growling. The man responds, "She can't be healed. Once you become a demon, you can never go back to being a human." I try to reason, "I'll find a way no matter what! So please... so please don't kill her! I'll hunt down the one who slaughtered my family! I'll make everything alright! Please! Please!" The man raised his sword in the air, and pointed it at Nezuko. "Don't do it!" I yelled once more. I got onto my knees while saying in my mind,
"Please don't take anyone else from me."
I beg him not to kill her with my forehead touching the ground. "I'm begging you not to.. please! Don't kill my little sister. Please don't do it" I sob. "I'm begging you." I finish.

-Unnamed swordsman POV-
I put my head down in rage, and yell at the boy, "Don't ever give others the chance to murder you! Stop that pathetic grovelling! If it was the least bit effective, your family wouldn't be dead!" The boy looks up at me, and I continue, "How can a weakling, how can't take the initiative in such a situation heal his sister? Hunt down the enemy? Don't make me laugh! The weak have no rights or choices! Their only fate is to be relentlessly be crushed by the strong! The demon might know how to cure your sister! But don't think a demon will respect your will or wishes! Naturally, I have no respect for you either! -That's reality!" I say while this demon continues growling. "Why did you throw yourself over your sister earlier? Was that your way of protecting her? Why didn't you swing your hatchet? Why did you show your back at me? All those blunders led to your sister's capture!" I say while I point my sword toward him. "I could've skewered her along with you!" I finish as this demon girl continues to growl.
"Don't cry."
"Don't despair."
"Now's not the time for that."
"I know you're devastated."
"Your family was massacred, and your sister's become a demon"
"I know it's painful"
"I know you want to scream"
"I get it."
"If only I'd gotten here a half-day sooner, your family might not have ended up dead, but there's no way to turn back time."
"Feel the rage"
"The powerful, pure rage of not being able to forgive will be your unswerving drive to action!"
"With such a fragile resolve like yours, you can't protect your sister or heal her... or get revenge for your family!"
I thought while I point my sword toward his sister.
The boy yells, "No!" I stab his sister. The boy gets up and yells, "Stop!"

-3rd Person POV-
Tanjiro throws a rock at the swordsman while he blocks it. Tanjiro immediately ran for the hatchet as the swordsman watches him. Tanjiro threw another rock as the swordsman just dodges. Tanjiro threw the hatchet into the air as he charges at him, faking him out. The swordsman thought, "A straightforward attack driven solely by emotion..." "You fool!" He yelled as he slammed his handle onto Tanjiro's back, knocking him out. Nezuko looked at Tanjiro's unconscious body with concern. The swordsman thought, "Where's his hatchet?" He gasped as the hatched could be heard hurdling towards him. He barely dodged as the hatchet hits the tree. He thought, "Just before he hid behind the trees, he hurled that rock towards me, and at the same time, tossed the hatchet in the air. He hid his hands as he pretended to attack, so I wouldn't realize he was unarmed. He knew he couldn't beat me. He tried to bring me down after I struck him! This kid..." Nezuko started to thrash and growl, interrupting the swordsman's thoughts. Nezuko finally got loose from his grip and kicked the man. The man was launched back with a grunt. He stopped and saw Nezuko and thought, "Damn! She'll devour him!" He widened his eyes in surprise at the scene in front of him. He remembers the words Tanjiro said.

"Nezuko... It wasn't Nezuko. She'd never eat humans!"

Nezuko got into a defensive stance in front of Tanjiro. She growls as she charges at the swordsman. The swordsman thought while dodging Nezuko's attacks, "Long ago, someone once said the same thing, only to be devoured by a demon. When a demon is starving, it will kill and devour even its parents or siblings. Because they're nutrient-rich. I've seen it happen more times than I can count. This girl has been wounded, and she's expending energy to heal those injuries. She must've drained vast amounts of her strength as she transformed into a demon. That means she's severely starved at this moment, without a doubt. She must've wanted to feast on a human right away. Yet, she protected him instead by intimidating me." Nezuko jumps into the air and onto a tree, launching herself toward the man in an attempt to hit him. The swordsman thought while putting his katana into its sheath, "I wonder... These siblings might be... different from others." The man chops Nezuko's neck with his hand, knocking her out.

-Within Tanjiro's mind-
Tanjiro's whole family kneels beside Tanjiro while sighing. Kie moves closer and says, "I'm sorry to leave you behind, Tanjiro. Take care of Nezuko for me, all right?"

-Real World (3rd Person POV)-
Tanjiro wakes up and instantly grabs Nezuko. He tears up as he thought about her and his family. Nezuko has a bamboo piece in her mouth. The man from before asks, "You awake?" Tanjiro looks up and picks up Nezuko in fear. The man said, "Go see an old man named Sakonji Urokodaki who lives at the foot of Mt. Sagiri. Tell him that Giyu Tomioka sent you. She seems to be all right since it's cloudy now, but never let her be exposed to the sunlight." The swordsman disappears faster than Tanjiro could see.

-Small Time Skip-

Tanjiro prays to the five graves, along with his little brother, he dug for his family as Nezuko watches from behind. Tanjiro stands up and says, "Let's go." They walk down the path to the woods hand in hand. He looks back at the gravesite and, with newfound determination, he looked ahead and started running his way towards Mt. Sagiri to meet the man Giyu calls Sakonji Urokodaki.

Chapter 3: End.

I decided to make Tanjiro as strong as he was when he finished Final Selection.

I forgot to mention that, Just like Goku, Tanjiro never forgot the Saiyan biology like the will to train, and being excited during fights (Mainly because the Saiyan cells are like that).

-A little secret-
Tanjiro thought he was faster than anyone, but saw that man being way faster than him.

*The only reworked parts were Giyu vs Nezuko and Tanjiro, and the scene where Tanjiro prays to the six graves.*

1,683 words in total.