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

Back Then

"He's right there!"

Tanjiro yells to Genya, "Genya! Head straight Northeast! The fifth body is hiding somewhere near the ground! Head over! I'll cover you!" Tanjiro begins to cover as Genya thought, "Northeast!" Tanjiro shouts, "Nezuko! Go and help Genya! Don't let the demons get in his way!" They were blown around from Karaku. He planted his feet in the ground and held on to a tree as he thought, "Don't get blown away! Oh shit! There's a lightning attack coming!" Nezuko charged at Sekido before he could release the attack but was stabbed by Aizetsu and pinned to a nearby tree. Sekido was about to release a lightning attack on Nezuko but had his arm cut off by flames and a quick blur. He looked to the right and thought, "That kid. He's faster than before. No. Based on the information I got from that man and from the first time we my. He has exceptional reflexes and quickly adapts to battle. He undergoes explosive growth during critical moments." Tanjiro targeted Urogi next and slashed him a bit. Nezuko grabs Aizetsu's head and pushes his spear deeper into her torso. It did nothing as Nezuko latched to Aizetsu and lit him on fire. He began to scream in pain while Sekido quickly regenerated and thought, "Shit! Karaku! Do it now!" Karaku instantly knew what the look meant on Sekido's face meant and waved his leaf onto Tanjiro. Before he could get a full swing, Tanjiro gritted his teeth and transformed in front of the two. Sekido thought, "What is this? This glow... this heat... Is he even human?" Tanjiro delivered a punch to Karaku's gut and sent him flying to a tree. The moment Karaku hit the tree, he powered back down to his base form. Karaku gets up and lunges at Tanjiro and threw a kick. Tanjiro hops back and yells, "Genya! Right side! He moved south! Go get him!"
Genya ran through the forest in search of the fifth body. While running, he thought, "I'm looking! I've been looking this whole damn time. Is he using some kind of technique? I still can't see him because of some stupid technique? Shit! Where is he? The longer this drags on, the more energy I waste." He then hears Tanjiro yell out, "West! Right side! He's close but directly below you!" Genya scans around his feet and thought, "What? Where? Where is..." Genya finally locked eyes with the fifth body but it was very small. He thought in surprise, "Fucking tiny!" He fires his double-barrel but misses the demon. He went and chased the demon while thinking, "He's way too small. Is this even the main body? This guy? Damn it. Can I even follow this guy? He's nearly the size of a rat. Those four are way too strong. And this runt is controlling all of them? Playing cat and house while fighting those four is a pin. I can see how every Demon Slayer who fought him to this point got killed. Damn sly punk! That's a dirty way to play!" Genya swung his sword at the demon. The blade made contact with the demon's neck but had a hard time getting through. After a few seconds of battling, Genya's sword was snapped in half. He thought, "I can't cut him! Fuck! Come on! So... His neck's so fat that I can't cut his head off with a blade." He pointed his gun at the demon and fired. He hit the demon and thought, "I hope that did." The make started to clear and the demon stood still. Genya again thought, "What!? It's not working!" Genya felt something behind him and thought, "Crap! I was too slow! I can't escape. I'm gonna die. My head won't regenerate. Aniki I wanted to be a Pillar so you would accept me. And I wanted to apologize for what happened 'back then'."

- Genya's Memory -

"My mother had a really small frame. I was bigger than her at an early age. She worked from day to night. I never actually saw her sleep. My dad was not only big, but he was also pathetic. The fact that he was hated by everyone and got stabbed to death was no surprise. He would often hit not only her but us as well. But my mother protected us from that monster without any medication despite her size. I thought she was amazing."

"Mom hasn't come back yet. I hope she's okay," said one of Genya's siblings. Genya held the youngest sibling in his arms and said, "She'll be fine. Nii-chan went to look for her." The same sinking says, "But..." Another sibling says, "She was never this Kate before. The sun is setting." Genya said, "It's fine. You're probably tired, so just sleep. Once you wake up, mom and nii-chan will be back." Three bangs were heard on the door. All four siblings, who could walk, ran to the door as they yelled, "Mom!" Genya shouted which woke up the youngest in his arms, "Wait! Don't open it! It might now be mom!" The door bursted open with the four siblings getting slashed up. They all fell, dead. Genya was also slashed from the nose to his right cheek. Genya looked up and saw a thing that looks like his mom. He thought, "An animal? A stray mutt... No! A wolf? It's too dark to see! It's fast!" The 'wolf' lunged at Genya but was tackled to the ground by his older brother. His older brother Sanemi, screams, "Genya, run for it!" Genya shouts, "Nii-chan!" Both the 'mother' and Sanemi slammed through a shoji window and dropped to the ground below. Genya immediately looked at the youngest in his arms and to the other whilst saying, "Shuuya! Hiroshi! Koto! Teiko! Sumi!" He tended to their wounds while saying, "Just put pressure on the wounds! I'll go call a doctor right now! Just hang on a little more!"
He began to dash down the street when he saw his older brother standing over their mother. Genya took a closer look when he got closer and saw Sanemi full of blood. He begins to whimper, "Mom! Wahhh! Mom! Mom! Why! Why did you kill mom? Murderer! Murderer!" Genya held his mother in his arms while balling.

"I'm sorry for saying such cruel things, nii-chan. I know it'll just end up spending like an excuse, but I was panicking. Shuuya, Hiroshi, Koto, Teiko and Sumi were all cold and they weren't answering. Dammit. They're all read. And I knew that. And that wolf, or what I thought was a wolf, was our mother who recently turned into a demon. You fought to protect us. The sun had just gone down when I set foot outside and realized that the thing that attacked our family was our mom. I wonder how you felt, nii-chan. How did you feel when you killed our beloved mother? And despite being in extreme anguish, when you were verbally berated by the brother you fought so hard to protect. Even though we had just promised to protect her together.

- Earlier In Genya's memories -
Sanemi said, "Genya. Let's protect our family together. Dad got stabbed and died. I know it's better without him, but everyone will be helpless now that he's not here. From now on, you and I will protect mom and our siblings. 'Kay?" Genya says, "Just from now on. Because that's always been the case. Right?" Sanemi looks at his younger brother and smiles.

- Back With The Battle -
Genya thought, "Sorry, nii-chan. I'm gonna die without ever apologizing. Seeing that memory of you smiling was really well-timed. I have no talent. I can't use breaths. I can't be a Pillar. I have to be a pillar to even see the other Pillars. I worked hard, but it was no good." Genya imagined his brother saying stuff like,

"Worthless shit like you is not my brother."
"Get the fuck out of the Demon Slayer Corps."

Genya thought, "But why? I am your brother!"
The staff got near to his neck as he readies to shake the Devil's hand. But before that could happen, Tanjiro slashed Sekido's arm with a yell. Genya was just scraped on the neck while Tanjiro encourages the boy, "Genya! Don't give up! Just go for it one more time! Go for his neck once more! Don't ever give up! You can get him next time! I'll protect you! Just think about cutting his head off! Aren't you going to be a pillar? Shinazugawa Genya?" Tanjiro drops to the ground but felt something behind him. Aizetsu comes from the shadows and thrusts his spear many times at Tanjiro. Tanjiro ducked down in fear but wasn't struck by any spears. He looked io in confusion and saw Genya. Genya was filled with holes as he weakly said, "Go." Tanjiro gasped and screamed, "Genya!!" Genya adds, "I can't cur he hears. You do it. I'll give you the honours just this once." Tanjiro listens and dashes to the fifth body. Genya shoots as lightning strikes but misses Tanjiro. Tanjiro's blade then was engulfed in fire as he thought, "There! He's tiny...!" He swung at the fifth body in hopes it kills it.

Chapter 95: End.

-A Little Secret-
With his advanced mentality, Tanjiro was able to learn Flame Breathing in just three months.
(A/N: In this story, Tanjiro needs to see techniques done to learn and imitate them. Urokodaki never showed Tanjiro Water Breathing, that's why it took him so long to learn it. Kyojuro showed Tanjiro every technique, excluding the Ninth Form.)

1,616 words in total.