On the wave of this fury, he would usually start tearing his opponents to shreds. In fact, this was how Yosaku initially earned the nickname "The Butcher." Knowing that nothing truly irreparable would happen to him, Zoro and Luffy had deliberately made Yosaku fight opponents he wasn't yet ready to face. Naturally, in such battles, he was almost always killed, after which he would recover, becoming truly enraged in the process. Unlike ordinary people, whose blinding rage grants only short-lived strength—followed by an inevitable "recoil," both physically and psychologically—Yosaku could remain in such a state for ten, twenty, even thirty minutes. It's quite possible he could remain in such a state even longer, but this had yet to be tested. Yosaku couldn't get truly furious at Zoro, Luffy, or Johnny, no matter how much they injured him, and other opponents who could not only inflict significant damage but also endure even a few minutes of battle with the enraged Yosaku were nonexistent in East Blue. Excluding the Straw Hat crew, Yosaku was one of the most dangerous people in East Blue, and amplified by his own fury, he could guarantee to tear anyone apart. Especially recently.
This time, in addition to the usual rage from pain, Yosaku was also angry at himself. After taking such a "hit," Yosaku could honestly admit that he had really messed up… grossly underestimated the situation. Why did he think he could withstand the attack from duck-lips so calmly? Too much water, so duck-lips wouldn't be able to release it all at once? If one didn't know the real capabilities of fish-men, it might seem logical. However, what Yosaku couldn't understand was why he thought that if duck-lips couldn't shoot all the water at once, then his attack wasn't to be feared? Now, Yosaku clearly understood that even if duck-lips couldn't shoot all the water at once, a small water ball, the size of a cannonball, could still achieve the same result, if not better. A smaller volume of water released at once means greater pressure, and considering the already demonstrated power, a water ball the size of a cannonball could likely pierce through a person or completely knock off their head. Again, it all seemed so obvious to Yosaku now… and that only made him angrier! If it was so obvious, why didn't he realize it right away? It's infuriating!
What infuriated Yosaku even more was Luffy. Not Luffy himself, but his warning words from just two weeks ago. Luffy had openly said how dangerous it could be to be hit by any unknown attack, even if you're almost immortal. Yosaku had thought he understood it back then… he didn't understand anything! Now Yosaku could speak with certainty about it. However, there's no evil without good, and now Yosaku truly understood everything Luffy meant. For that, he had to thank duck-lips… before killing him. Understanding or not, thanks or not, by the time Yosaku finally fully recovered, the world for him was shrouded in a red haze of fury. Moreover, the fish-men themselves drove Yosaku into a final frenzy —not because of his death, with part of the blame on Zoro and a significant part on himself— but for daring to touch Nami. No one dares to touch Nami. No one dares to touch the Straw Hat family. In such a state, Yosaku's reasoning was minimal, so the only mercy he could show was quick death. Actually, he was incapable of restraint in such a state, so no torturing, just killing, and preferably as brutally as possible, to avenge all the pain he had endured. "The Butcher" is indeed "The Butcher."
"It seems our exchange of blows is coming to an end," Johnny said with a bloodthirsty grin, looking directly into Kurobi's eyes. "It was a mistake to anger my friend so much. When he's in this state, even I'm a bit afraid of him, and he'll tear you all to pieces. I've seen him do it more than once."
"Your friend has a broken spine; he won't be able to do anything to us," Kurobi replied tensely, his former arrogance reduced to mere shreds. After eight years of easily dispatching his enemies with one or two blows, facing an equally strong opponent —especially one not among his own kind but among those he despised— was clearly unsettling.
"If you guys came from the Grand Line, you must know about Devil Fruits," Johnny's smile grew even more bloodthirsty. "Yosaku is unkillable! Do you understand what that means? If not, let me enlighten you: your friends have just pissed off an immortal!"
Johnny could honestly admit that intimidating his opponent was a damn enjoyable task! And although the truth about Yosaku was far more mundane than he made it out to be, Johnny was mostly telling the truth. His words gained even more weight in Kurobi's eyes when, just ten seconds later, a furious Yosaku got to his feet. Kurobi immediately became noticeably anxious, the other fish-men were visibly surprised, and the villagers, led by the village doctor who had just confirmed Yosaku's broken spine —"He'll never walk again! Damn it, he shouldn't even be alive!"— were completely stunned.
Yosaku's bloodshot eyes zeroed in on his main 'tormentor,' and his face took on such a terrifying expression that even the arrogant fish-men felt uneasy. The villagers scattered in fear: at that moment, Yosaku seemed more like a villain than the entire Arlong crew combined.
When Johnny said the fish-men managed to anger an immortal, he had indeed exaggerated, but he had also left a lot unsaid. For instance, he didn't mention that a truly enraged Yosaku became exponentially stronger and could stay in that state for a long time. Additionally, Yosaku, used to enduring all kinds of monstrous pain, became completely immune to it. In such a state, he could have his elbow bent backward and not even notice it—tested and proven! Nearly immortal, insensible to pain, monstrously strong, and essentially driven mad by pain and bloodlust—such a Yosaku could only be stopped by decapitation or, at the very least, severe mutilation of his head. Even with a destroyed heart, he could sometimes move for a while before it fully healed. It was clear that when Yosaku was in this state, his regeneration worked unusually fast. As if that wasn't enough, Yosaku had two additional trump cards in such a state.
Johnny wasn't joking when he said he was somewhat afraid of his friend in this condition. It might not be on the level of Zoro or even more so Luffy, but Johnny knew he would lose to such a Yosaku without question. Usually, they were evenly matched, and even if an enraged Yosaku became exponentially stronger and completely pain-insensitive, Johnny could still compete with him. After all, his mythical zoan fruit endowed him with many interesting abilities. However, the last two trump cards that Yosaku possessed only when he was truly enraged completely outweighed any advantages from a rare fruit.
Ultimately, while Johnny was suited for fighting against large numbers of enemies —like the over ten thousand pirates in Krieg's Armada— Yosaku was perfect for one-on-one fights against strong opponents. It was no surprise: that was how Luffy and Zoro trained the two friends. They were always together, complementing each other perfectly in unforeseen situations… back then. Now, even one of them was enough to handle nearly any guard in East Blue. As for pirates, there were none left in this part of the world, except for those present. All the others had died in somewhat unnatural ways.