Well, if Naruto was trained by Danzo, he might be more ruthless at first. But joining Team 7 could soften him up. He'd probably bring some of Danzo's combat techniques and secrecy to the team. It could make for an interesting dynamic, with Naruto being a bit more of an enigma compared to his canon self.
In a fanfic where Naruto is trained by Danzo and joins Team 7, Naruto's personality would likely be a blend of Danzo's influence and his own natural self. Danzo's training could make Naruto more calculating and less impulsive. When he joins Team 7, he'd have to adapt to the group dynamics. His skills would be different, perhaps more focused on stealth and information gathering. This could lead to some unique missions for Team 7. His relationship with Sakura and Sasuke would also be different. He might be more guarded with them, and they might have to work harder to understand him. It would be a whole new take on the Naruto story with a darker and more complex Naruto.
If Naruto was trained by Danzo and joined Team 7 in a fanfic, his abilities would change significantly. Danzo's training would probably give him a more strategic mindset. He could be more proficient in using weapons and stealth. In Team 7, he'd learn to coordinate with Sasuke and Sakura. His chakra control might improve in different ways, and he could develop new jutsu that are a combination of what he learned from Danzo and what he discovers while on missions with Team 7.
In such a fanfiction, Naruto might become a more shadowy and ruthless ninja. Danzo's training methods are often extreme and focused on loyalty to the village above all else. Naruto could lose some of his idealism and become more of a tool for Danzo's political games.
Well, if Naruto was trained by Danzo in fanfiction, it would be a huge departure from his normal growth. Naruto is all about hope and friendship. But under Danzo's tutelage, he could be molded into a more cynical shinobi. His jutsu might develop in different directions. For example, he could be pushed to learn more dangerous and morally ambiguous ninjutsu. Also, his relationships with his friends might change as he becomes more secretive and less open - hearted due to Danzo's influence.
Well, in such a fanfic, Naruto might turn against his friends. He could be made to use his power for Danzo's often shady purposes. For example, he might be forced to target those Danzo sees as threats to Konoha in a more brutal way than he normally would. His relationships would be severely damaged as his friends would be confused and likely try to stop him, not realizing he's been brainwashed at first.
The story could take a dark turn. Naruto's friends would be in shock and disbelief. They would see Naruto as a traitor, and this would shatter the bonds of friendship that Naruto has spent so long building. For example, Sasuke might feel especially betrayed as he and Naruto had their own understanding and rivalry. The village would also be in chaos, with the villagers feeling scared and angry at Naruto's sudden change of allegiance.
Well, Naruto might become extremely powerful in terms of his mental manipulation skills. Aizen is known for his cunning and ability to deceive. Naruto could learn new ways to outwit his opponents. He might also gain some unique combat techniques that are more psychological in nature, rather than just relying on his physical strength and ninjutsu.
If Naruto were trained by Toriko in a fanfic, it would be an interesting blend of two different worlds. Toriko's training might introduce Naruto to a whole new concept of the 'food chain' in terms of power. Naruto could learn how to incorporate the energy from different foods into his jutsu. Moreover, the cultural differences between the ninja world and Toriko's world would create some really fun and unique interactions. Naruto might be shocked at first by Toriko's appetite but then learn to respect and utilize the power that comes with it for his own growth as a ninja.
Well, Naruto might gain some really cool new combat skills. Vergil is a very skilled fighter, so he could teach Naruto some advanced sword techniques or unique ways of using chakra in combat. Maybe Naruto would also pick up on Vergil's more strategic and calculating approach to battles.
In such a fanfic, Naruto might gain unique abilities. Cell is a powerful and complex character from Dragon Ball. If he trained Naruto, Naruto could potentially learn new combat techniques, perhaps even something related to Cell's perfect form's regeneration ability. This would make Naruto an even more formidable ninja in the Naruto universe.
Well, in a fanfic where Naruto is trained by Tremor, Naruto could end up with a whole new set of jutsu. Tremor's influence might lead Naruto to combine his existing Rasengan technique with earth - based chakra manipulation. This could result in a Rasengan that not only has the spinning force but also causes massive tremors upon impact, making it a much more devastating attack. Also, Naruto might learn to sense opponents' movements through the vibrations in the ground, giving him an edge in combat.