It could make him more hardened. Naruto is known for his optimism and belief in the good of others. Killing an army might shatter that belief and make him more cynical.
One interesting plot twist could be that Naruto is forced to kill the army because they are under a mind - control jutsu, and he has to find a way to break the control without killing them all at first. Another could be that the army he kills is actually a clone army created by a powerful enemy as a decoy, and the real threat is still hidden.
Wu Zhu had killed a large number of Imperial Army soldiers in " Celebrating Years." He had fought against the Imperial Army by himself and successfully killed his way to the Qing Emperor. Wu Zhu displayed outstanding martial arts and precise attacks. He used the metal rod to stab each Imperial Army soldier's throat, his movements simple and clean. The Imperial Army soldiers were unable to resist Wu Zhu's attacks and were eventually killed by him. Wu Zhu's fighting strength and ability to kill enemies left a deep impression on people.
The Seven Kills Army was not a character in a movie, but a character in a novel, comic, game, or other fictional works. Different fictional works might have different settings and storylines, so it was difficult to determine whether this character existed in a specific movie. If you have any relevant information or the title of the work, I will try my best to provide you with a more accurate answer.
No, it doesn't seem to be a common concept. Usually, Naruto fanfiction focuses on various aspects like character development, new relationships, or different story arcs that are more in line with the general themes of the original series, which is not mainly about 'kills'.
Well, he might use his powerful jutsu like the Rasengan. He could also summon his toads to help him out in the battle against the army. Maybe he uses his shadow clone technique to confuse the enemy and then strike them when they're vulnerable.
Well, he might start by using his charisma. Naruto has always been good at making friends. He could reach out to old allies from his village, like Shikamaru and Choji. Also, he might convince some of the outcast ninja who have been mistreated in other villages to join him. His reputation as a hero who saved the world would surely attract a lot of people.
In a fanfic where Naruto kills Sirzechs, it could be a very interesting concept. Maybe it's a crossover universe where the power dynamics are completely different. Naruto, with his powerful jutsu, might have a reason like protecting his own world from a perceived threat by Sirzechs. However, it also depends on how the author has set up the story, the rules of the world they've created, and the motives given to Naruto for such a drastic act.
If Naruto kills Rias in a fanfiction, it might be due to a misunderstanding. Naruto is known for his strong sense of justice. Perhaps in this fanfic, Rias is misrepresented as a threat to Naruto's world or his friends. But it's still quite a shock as they are from different fictional universes with their own moral compasses.
In fanfiction, such a plot would be extremely dark and out of character for Naruto. Naruto is typically portrayed as someone who values his friends and comrades, especially Hinata who he has deep emotional connections with. It could be a very edgy take in the fanfic world, perhaps exploring some extreme 'what - if' scenarios or alternate universes where Naruto has been corrupted or misinformed in some way.