If Naruto had Sayian and Kriptonion DNA, his character would change significantly. The Sayian DNA would add a layer of cockiness to his personality. We see in the Dragon Ball series that Sayians can be a bit full of themselves when it comes to their power. Naruto might start to show off his new powers more. The Kriptonion DNA would give him a sense of justice on a larger scale. He would no longer just be focused on the ninja world's justice but would look at the broader picture of the universe. His relationships with his friends might also change as they have to adjust to this new, more powerful and different Naruto.
Naruto's character would be a blend of his original self and the traits from the new DNA. His core values of friendship and protecting the weak would remain, but they would be expressed differently. With Sayian DNA, he'd have a stronger drive for self - improvement in terms of power. He might train even more vigorously. The Kriptonion DNA would make him more aware of the bigger threats out there. He could become more reserved as he tries to understand and control his new powers. He might also have to deal with feelings of being an outcast since his DNA is now so different, which could add a new dimension to his character.
One possible plot could be that Naruto somehow gets infused with Sayian and Kriptonion DNA. The Sayian DNA might give him enhanced strength and fighting abilities like the ability to transform into a Super Sayian - like state. The Kriptonion DNA could perhaps grant him some unique powers related to Superman's powers from Krypton, such as heat vision or super - strength on top of what he already has. He could then face new and more powerful enemies in the Naruto universe, like a combined force of rogue ninjas and alien invaders.
In fanfiction, if Naruto had Madara and Hashirama's DNA, his character development would be a wild ride. At first, he'd likely be confused by the new sensations and powers. As he explored them, he could discover new aspects of himself. He might start to show a more strategic side, like Madara, in battle, while still holding onto his core values of friendship and loyalty. His growth would be a struggle between the two legacies. He could even find a way to combine their different outlooks to create a new and unique ninja philosophy. This would not only change how he acts but also how others perceive him in the ninja world.
Naruto might become more cautious. Guns are very different from ninja tools, and one wrong move could be fatal. So he'd have to think twice before acting impulsively, which is a big change from his usual head - first approach.
His relationship with Sasuke might become more complex. Sasuke, who is always seeking power, might view Naruto's new ability with envy or suspicion. This could lead to more intense rivalries between them as Sasuke tries to either understand or obtain Naruto's power.
Naruto would likely become more confident. With Hulk - strength, he'd be able to handle most physical threats easily. He might also become a bit more reckless at first, as he gets used to his new power. He could be quicker to jump into a fight without fully thinking it through, knowing he has the strength to handle it.
Naruto would become more introspective. The Mangekyou Sharingan often comes with a heavy burden and dark secrets. He'd have to deal with the new powers and the potential corruption they bring. For example, he might start to question his own motives more often.
In some fanfictions, Naruto's DNA might change due to experimental jutsu gone wrong. For example, a mad scientist - type character could try to infuse him with a powerful demon's essence, which alters his DNA. This could lead to new abilities like enhanced strength and the ability to control different elements more effectively.
Naruto would become more powerful, and this might make him a bit more cautious. He's used to his regular ninja abilities, but the gura gura fruit's power is on a different level. He might be more hesitant in battles at first, not wanting to accidentally cause too much destruction with the fruit's earthquake - causing ability.
He might become more powerful. The Storm Release Bloodline could give him new offensive and defensive abilities, making him a more formidable opponent.
He would likely be more isolated at first. The Magu Magu Fruit powers are different from normal ninjutsu. His friends might not understand it fully, and he would need time to master it alone. This would make him more introspective, but as he gets better control, he would start to share his knowledge and use it for the good of the village. Also, his fighting style would change drastically. Instead of relying solely on his shadow clones and Rasengan, he would incorporate the heat - based attacks of the Magu Magu Fruit, making him a more versatile fighter.