Mary Sue and the chrome dome

Bisento closed her eyes as Muki pulled the trigger. "This is it. Sister, I'm sorry. You'll have to continue the path alone..."

Bang! 

Bisento's eyes shot back open and darted around madly. "Why? Why did you- miss," she thought as she quickly found the answer for her question. 

Standing behind Muki and restraining her was none other than Yamane.

"THE HELL ARE YOU DOING!?" Muki fumed. 

"Muki! You can't kill her! Killing's wrong!" Yamane cried. 

"I've already killed 3 of these fuckers, traded a 4th away to slavery. She's clearly in league with the bastards that tried to invade us, so I gotta finish her off!" 

"No she's not! Muki, you need to be more trusting!" 

"You need to open your eyes!" 

Yamane shook her head and squeezed Muki's arm, forcing her to drop her gun. She quickly confiscated it and attempted to carry off Bisento when suddenly Muki let out a pained scream. 

"You thought I'd run to the brush, mates? Nah, I just did a lil switcheroo and hopped up n' back down," Piranharoo snickered as he stood behind Muki, blasting her with lightning. 

"Leave her alone!" Yamane cried as she charged for Piranharoo. 

"You wanna fight me, sheila?" Come at me!" Piranharoo grinned as he shoved aside Muki and leaned back on his tail. 

As Yamane got in closer, Piranharoo unleashed a powerful double kick, but Yamane leapt over it effortlessly, landing a drop kick of her own right into Piranharoo's lower jaw. The impact sent him tumbling, but he quickly got back up and launched himself at Yamane. Yamane dodged the attack with a graceful back-flip, but Piranharoo brought his momentum to a halt and closed in on Yamane, unleashing a flurry of lightning-powered kicks at her.

True to her "Mary Sue" moniker, Yamane dodged every strike perfectly before landing in a powerful punch to the face. 

"You fucking sheila! How are you keeping up with me!? You're just a human!" Piranharoo fumed. 

Yamane didn't answer and just continued kicking ass. Desperate, Piranharoo attempted to try chomping off Yamane's arm, but he was too slow, and subjected to a powerful kick to the face, sending him flying. 

"What the fuck? This sheila's beating me up!? No, I still got me boomerang! She'll never stop it!" Piranharoo thought as he hurled his boomerang at Yamane. 

Rather than dodge, Yamane caught the boomerang in her bare hand, sustaining not even a scratch. 

"WHAT THE HELL! I heard you were mauled to the verge of death by gobbers! How the hell are you able to catch my boomerang without any blood coming out!?" Piranharoo fumed. 

"I don't know. That night, I didn't remember much, and I was caught off guard. Today, I'm protecting my sister at my best," Yamane declared as she crushed the boomerang in her hand. 

"Then what'll you do... IF I EAT YOUR SISTER!?" Piranharoo madly grinned as he encased himself in lightning and blasted towards Muki. 

Yamane was unable to intercept, and ran towards Muki as Piranharoo stood Muki upright. "Too bad! You can't outrun lightning! Say good-bye to this morose mess!" Piranharoo cackled as he opened his mouth and began to sing his teeth into Muki's head. 

Clang!

Piranharoo's eyes widened in shock as he found himself unable to close his jaws and chew off any flesh from Muki's head. "What the fuck!? Her head's metal!? Little shit! I'll just crunch harder!" he thought. 

"YAMANE! SHOOT HIM!" Muki shouted as blood began too ooze down her head. 

Though it went against her moral code, Yamane pulled out Muki's gun and pointed it at Piranharoo, seeking to kill him. However, her hand began to shake, and her finger failed to pull the trigger. 

"THROW ME MY GUN, YOU SHITHEAD!" 

Mustering all her strength, Yamane hurled the gun as fast as she could towards Muki. Miraculously catching it without getting hurt, Muki whipped it back and unloaded all that was left in the cartridge into Piranharoo's head. However, Piranharoo used his power to stop the bullets from penetrating too deep, preventing a lethal hit. 

"Your weapons can't beat the magic me mate, Hougen, gave me!" Piranharoo shouted as he released Muki's head and prepared to go in for a stronger bite. 

"Choke on it," Muki glared as she hurled her gun into Piranharoo's gaping mouth. 

The attack was so sudden, Piranharoo was unable to react, and swallowed the gun whole. Unfortunately for him, the gun was to big and hard to fit down his throat, and quickly became lodged in it. Piranharoo's eyes bulged out of his head as he stopped his attack and frantically began gasping for air and grasping his neck. 

"Don't let him swallow it or spit it out!" Muki yelled as Yamane arrived and leapt atop Piranharoo, holding his mouth shut, and wrapping her legs around his throat. 

Piranharoo struggled madly, even turning into lightning and leaping as high as he could into the sky. But Yamane never let go. 

"No, I ain't gonna die choking on food!" Piranharoo thought as his bulged eyes began to bleed and his consciousness began to fade. 

As he landed back on the ground, Yamane finally let go of him, allowing him to blast lightning down his throat to break up the gun. Just barely, Piranharoo had survived as he could now swallow the gun. 

Gasping for air, Piranharoo collapsed to all fours on the ground. "You... Blew it... Just had to... hold on for-"

Slice!

Piranharoo's face grimaced in horror as he saw the glimmer from Bisento's katana too late. In his weakened state, he had been decapitated. 

"And for good measure, we'll try one lengthwise," Muki glared as she raised the sword and brought it down on Piranharoo, slicing his head and body in two. 

"Fucking... sheila," Piranharoo thought as everything went dark for him. 

Piranharoo was finally dead. 

"Now... the elf," Muki panted as she wobbly turned towards Bisento. 

However, her body was unable to take anymore of the strain, and she collapsed to the ground, losing consciousness. Yamane frantically ran up to her, calling out her name over and over, but to no avail. 

"Hang on you two. I won't let anyone else die!" Yamane declared as she picked up both Muki and Bisento and began running off with them.