The Majin Pirate: One Piece x Male reader

Backstory Chapter #1

"(M/n)! I found Bobo!"

The young males eyes glowed as his sister brought him his favorite stuff toy.

It was an purple stuffed octopus.

"Bobo!" (M/n) took the octopus from his sister's hands.

"I'm so glad you were able to find it! (M/n) was starting to get depressed."

"Thank you, Faith!"

(M/n)'s smiled was full of nothing but pure love and admiration. He loved his sister dearly. She was his guide on life as well as his mother.

"You're welcome, bud! Mom! Where's dad?"

"He's out. He went to receive an order he placed."

"What order?"

The mother shrug her shoulders.

**
It was nighttime and the family stayed up late and waited for the man of the house to return. It was silent until a knock was heard at the door. The mother got up and opened the door to reveal her husband.

"I'm back and I brought gifts!" He had a basket with three different fruits in it.

One looked soft, mushy, and pink. It had a weird looking "M" placed at the center of the fruit. He gave that one to the youngest, (M/n).

The other was slightly larger than the one he gave (M/n). It was blue and light and looked hard to bite through.

The last one was awfully bright, blindingly bright even. It was very dazzle and looked like it was a diamond. He gave that to the older sister.

"What kind of gifts are these?" The oldest sibling asked.

"They're very exotic fruits. I had a friend of mine bring some. I heard they're very delicious. So, why not take a bite?"

Only the older sister saw the evil grin behind his smile as the others were blind. She wanted to warn them but it was too late.

(M/n) and her mother already bit off the fruits. Seconds later, tragedy struck.

A barrier formed around the woman of the house. This confused the mother as she looks around herself. The barrier looked almost holographic and completely see-through.

"Huh?"

"The Dome-Dome Fruit. Allows the user to create an barrier around themselves from their own life energy. The barrier blocks, reflects, absorbs, and retaliates strong attacks. Aren't you lucky?"

"NnnNnhggn-" The transformation was obviously painful for the youngest of the house. His skin turns pink, his hair grew long and messy, his ears become pointed, and he gains a tail. His attire changes to a black tight shirt with black arm sleeves, and white baggy pants.

"The Majin-Majin Fruit. A fruit that gives you so many abilities that I can't name them all. Though, as you can see, the transformation is painful." The youngest calmed his screaming and stood up. His figure was wobbly from the recent pain. Once the pain faded, he stood up straight.

"(M/n)? Are you oka-" The mother's words were cut once she saw her child's eyes.

His scleras were black, his irises were red, and his pupils were black.

"........" The young male smiled as looked down at his hands.

"Brother are you oka-"

(M/n)'s tail instantly wrapped around his sister's neck at amazing speeds.

"Ughg!"

The tail constricted around her neck causing her to lose air rapidly.

"(M/n) stop!" The mother attempted to run at her son until a blast was sent towards her.

In an attempt to brace for impact, the barrier appeared around his mother. The barrier blocked the blast which only pissed off the male even more.

He slung his sister to the wall and glared at his mother.

"That barrier might be a problem. I'll have to kill you quickly." He lifted his finger and shot multiple beams at the barrier. The only thing she can do was block the attack. The male was getting frustrated.

He growled in annoyance making a (f/c) aura surrounds him. His eye twitches as he made a blade out of his aura. The blade was small and (f/c) with uneven edges at the sides. He dashed to his mother who repeated the act of defending herself.

"It seems that he isn't able to control his temper. Attacking his mother and knocking his sister unconscious, an amazing experiment! But I guess the barrier is stronger than I thought. I have no choice but to use my Devil Fruit. The Weaken-Weaken Fruit. This allows me to weaken a person's Physical strength and Devil Fruit power for a limited time."

"Well, isn't that convenient?" A beam went through the man's heart. His back fell to the ground. The young male smiled, ripping off his arm. His mother screamed in shock and terror. The old arm was instantly replaced with a new one and the old one turned into a pile of pink goo. The goo jumped off (M/n)'s hand and traveled to his father. Once close enough, the goo grew in size and engulfed (M/n)'s father.

The mother was beyond frightened. Her son that she loved dearly was turned into a heartless monster by his own father.

The goo returned to (M/n) crawling up his leg. He liquefied his body and fused with goo.

After a few moans and groans, (M/n) solidified his body again.

"Ah, that feels so much better."

(I'm making to where (M/n)'s body doesn't change he just gains abilities.)

"Now, where was I?" His aura was stronger than before pushing furniture out the way. He quickly dismissed his new aura and replaced it with a more calm sparkling white one.

The barrier fizzles a little from the calming aura.

"So this is how he always won arm wrestling competitions. Cheater." The male increased the energy of the aura, causing the barrier to completely fizz out.

Her eyes widened in fear and her legs shook paralyzed.

(M/n) took slow steps towards his mother. With every step, her fear heightens.

"You and that barrier was real trouble. Good thing your husband was useful for once, huh?"

"W-what did he do to you?" She had nowhere to run and if she did, there was no doubt (M/n) would catch her.

"I don't know. But what I do know, is that I'm..strong." (M/n)'s energy blade pierced through his mother's heart. After her body fell to the ground he did the same process as what he did to his father.

"Well, that was fun..."