#stone world

"Yo!" The older responded with a cheeky grin, and a hand raised in the air.

She had her white hair tied up in a high ponytail, showcasing their family's signature green hair tips at the ends. A lone hair strip crossed her eyes and curved to her chin.

"Heh, isn't this the lil' shit? You grew!" She jumped down the tree and walked towards the group. 

"You guys know each other?" 

Senku rubbed his temples. 

"Yea. She's my older sister-" 

"Sister?!" The woman grinned as she stopped right in front of Senku, and they brofisted as if it was normal, then followed by a noogie. 

"O-Ouch! What the heck-" 

"It's been a while you lil' shit! I thought you would have died or buried ten feet under!" Senku pulled out of her grasp and deadpanned at her. 

"Ha, you wish. Where were you even? I tried looking for you and I couldn't-" 

"Oh I came here by skateboard-"

"Skateboard?! Did you just say SKATEBOARD?" Gen's screech was followed by dazed and confused villagers. She pointed to the huge skateboard made of wood?! How?

It doesn't even look like a normal skateboard, in fact, it could be deemed as a boat with wheels at this point.

"Yea, you see, I'm an engineer. So I make shit, attach shit, and fix shit."

She definitely got a crude mouth too; everyone thought at the same time. 

"Heh, as expected of the gorilla-" Senku was cut off by the pulling of his hair.

"Hey, shouldn't you be telling me what's going on? Since when did you have so many friends?" She scrutinized every single person around, and others shivered under her look.

"Oi! Stop that! I'll explain later, but we have a war to win!" Senku escaped and then gave her a evil smirk. 

"What'cha say we make an evil weapon? With you here..."

"Oh ho?" An evil aura burst forth from the two siblings. 

"Gen...we're so screwed." 

"Kohaku...we're fucked when he's already our last hope. And now, there's another one?" 

"You got an issue? Half and half?"

"Half and half-" Gen spluttered but swallowed his pride when he saw the toned muscles underneath her coat. 

"Not bad." Senku acknowledged with nod.

"Unlike you, I work out." She rolled her eyes in response.

"Anyway, where were you exactly?"

"In hell. But now that I'm here, looks like I've reach purgatory-OW!" Senku tased her on her sides, making her jump.

"You-" Before she could unleash her wraith, Senku stops her with a question.

"How did you find me?" Senku asks sternly, and the older sighed.

"Just exploring on my own and I decided that I should find you lil' shit. So I made myself some shit and before I know it, I spot a bunch of weirdos hoping around a big pot and a fucking leak-"

"Oh fuck you."

"Oops, can't hear you over your bushy hair."

Senku rolled his eyes.

"Idiot." 

"Leek."

"Baboon."

"Loverboy."

"What? Where did you even get that from!?" 

"What? You just looked like one." She simply shrugged with a cheeky grin.

"That's not a sight you see every day. Senku's outmatched." Gen mentioned, while he watched the two siblings bicker.

Kohaku simply laughs and shakes her head.

"He deserves it."

"I'm ten billion percent gonna throw you to the wolves!" Senku almost but roars with steam going out of his head.

"And I'm ten billion percent going to hull your ass to Antarctica!" She mimicked with a girly voice, the complete opposite of her natural deep one. She then looked at Kohaku with a smile. 

"You there, you're the lil' shit's wife?" 

"W-What? No!" 

"Well who gives a fuck. Anyway, explain this war to me. I'll help you guys out." 

"Really? That would be great!" 

"Yea, explain to me what's going on. And I also need names. I can't be calling ya lil' shit's gf can I?" 

"No thank you!" 

After a solid explanation of the current situation, Senku's sister tilted her head and yawned.

"So...we're going up against this dude who's like a bitchy communist dictator kid with Heracles's strength," She looked around at the group.

"And the mother fucker who's a huge hypocrite is reviving assholes of his liking in order to kill innocent children like y'all because he thinks technology is absolute shit."

Well that's one way to look at it. 

"Uh...translation please? What's a Heracles?" Chrome jumps in and asks while scratching his head.

"It's Tsukasa but stronger." Senku simply says, and Chrome and Kohaku accepts it without question.

Gen sighs.