Rimuru and Ultima Goes To One Piece (Rimuru and Ultima x One Piece)

Chapter 14: A Clash in Fishman Island

The tension in the air was palpable as Hammerhead faced off against Ultima, his massive form towering over her. The Fishman pirate, renowned for his brute strength and intimidating presence, sneered at the young demon who stood calmly before him.

"You think you're hot stuff, don't you?" Hammerhead growled, clenching his fists. "I've crushed bigger and stronger enemies than you. You're nothing!"

Ultima raised an eyebrow, her lips curling into a smirk. "Bigger and stronger, huh? That's cute."

Rimuru, standing a few paces behind her, crossed his arms and watched with amusement. He could sense that Ultima wasn't taking this fight seriously—not yet, at least. Hammerhead was formidable, but to someone like Ultima, who had mastered advanced Haki, he was little more than a nuisance.

"You talk a lot," Ultima said, her eyes gleaming with excitement. "But can you back it up?"

Hammerhead's expression darkened, and with a roar of fury, he charged forward, his massive fists raised high to deliver a crushing blow. He moved with surprising speed for someone his size, closing the distance between them in an instant.

But Ultima didn't flinch. Her Observation Haki was already activated, allowing her to sense every move Hammerhead made before he even began his attack. She casually sidestepped his punch, leaving his fist to smash into the ground with a deafening crash.

"Missed me!" Ultima taunted, laughing as Hammerhead's eyes widened in surprise.

Hammerhead snarled and swung his other fist at her, but once again, Ultima effortlessly dodged, moving with a grace that made her look like she was dancing around him.

"Come on, is that all you've got?" Ultima teased, her voice dripping with mockery. "I thought you were supposed to be some big shot on Fishman Island."

Rimuru chuckled from the sidelines. "She's having way too much fun with this."

Hammerhead, growing more and more frustrated, continued to launch wild attacks at Ultima, but none of them came close to hitting her. She dodged and weaved around him, her movements so fluid that it seemed as if she wasn't even trying.

"You're too slow," Ultima said, grinning as she ducked under another swing. "You really should have trained your Haki more. Maybe then you'd stand a chance."

Hammerhead roared in fury, his pride wounded by her taunts. "I'll crush you, you little—!"

But before he could finish his sentence, Ultima decided she had had enough. The playful expression on her face faded, replaced by a cold, serious look.

"Okay, enough games," she said, her voice dropping to a low growl. "Let's see how you handle this."

In an instant, Ultima's Armament Haki flared to life, coating her fists in a shimmering black aura. But this wasn't just any Armament Haki—it was Advanced Armament Haki, the kind that could bypass defenses and directly damage a person's internal organs.

Hammerhead's eyes widened as he felt the sudden surge of power coming from Ultima. He instinctively stepped back, but it was too late. Ultima moved with lightning speed, closing the distance between them in a blink.

Her fist shot forward, aimed directly at his midsection. Hammerhead barely had time to react before the blow connected, and when it did, the force of it was overwhelming.

A sickening crack echoed through the air as Ultima's punch landed squarely in Hammerhead's gut. The impact was so powerful that it shattered several of his ribs, and a wave of agony shot through his entire body.