In the fanfic, Sasuke's jealousy of Naruto's sword could lead to some interesting character development. At first, Sasuke might be angry and bitter. But as the story progresses, he could realize that his jealousy is unfounded. Naruto might use the sword in a selfless way to protect the village or their friends. This could make Sasuke reflect on his own motives and goals. He might then start to see Naruto in a new light and instead of being jealous, he could learn from Naruto's example of using a weapon not for power or glory, but for the greater good.
One possible plotline could be that Sasuke sees Naruto with a powerful and unique sword. He becomes jealous because he feels Naruto is getting more attention or power because of it. So, he starts to train harder to prove he doesn't need a sword to be strong. Maybe he challenges Naruto to a sparring match to show that his own skills are superior without any fancy weapon.
Well, perhaps in the fanfic, Sasuke has always been the one with more traditional ninja weapons and skills. But when Naruto shows up with this amazing sword, Sasuke's jealousy kicks in. He might start to secretly investigate where Naruto got the sword from. He could end up finding out that there is a whole mystery behind the sword, like it has a special origin or a hidden power. And all this time, his jealousy is fueling his actions as he tries to either get the sword for himself or make Naruto lose it.
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Chapter 432, "Return to the Homeland!", is the clearest early answer because it pushes Yu Li into a new phase or setting. The chapter turns that into something concrete by moving from Jiang Li had also received the updated rankings. to He looked at the owner with a hint of surprise..
Chapter 810, "I'm Waiting for Death", is the clearest early answer because the violence around Brother becomes final instead of hypothetical. It opens with Jiang Buchen was about to go crazy from hunger. and closes on Alright, he's satisfied even if he dies after eating such tasty food..
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Chapter 513, "A Public Stage", is the clearest early answer because it turns Jiang Mingyu's situation into a concrete plot event. Early on, Everyone was sharing their experiences in a few words, the banter.... By the end, It's Shiguang's group!" "Performing right after Xi Yang, that's....
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