He would become more reliant on his friends and allies. Since he doesn't have chakra to fall back on, he has to trust others more and learn to work in a team in a different way.
His relationships could change too. People who were drawn to his chakra - related powers might treat him differently. He could also form new bonds with those who respect his determination to keep fighting despite not having chakra. He would have to find new ways to prove himself, and this could lead to a more complex and multi - faceted character development as he struggles to find his place in a world where chakra is so important.
Naruto might develop a more cautious personality. In the original story, chakra gives him the ability to be bold in battles. Without it, he would have to think twice before getting into dangerous situations, which could lead to a more calculating and less impulsive Naruto.
He might rely on his physical strength and martial arts skills. Just like Rock Lee in the original series who doesn't have much chakra but is a great fighter through intense physical training.
Naruto would likely become more diplomatic. As an emperor, he can't just rely on brute force like he sometimes did as a ninja. He'd have to think about the long - term consequences of his actions for the whole empire. So, he'd develop better negotiation skills.
Naruto might develop a more cynical view of the world at first. Since Obito is involved in his 'founding', there could be darker elements in his upbringing. He may start off being more distrustful of others. However, as he discovers the truth about Obito's actions, he could use that knowledge to grow into a more complex and empathetic character, different from the naive but positive Naruto in the original story.
Naruto would be more self - assured. In the original, he was always seeking approval because he was an orphan. With his parents alive, he'd have that unconditional love and support, so he wouldn't be as desperate for others' recognition.
In some fanfictions, Naruto might use chakra strings in a similar way to how Sasuke uses his chakra to control his sword. He could send out his chakra in the form of strings to manipulate objects from a distance. For example, he could use them to pull weapons out of an enemy's hand or to tie up an opponent.
His personality might be more independent and self - reliant. Without the constant presence of the village and its social structures, he has to trust his own instincts more. So he becomes less likely to seek approval from others.
Snape's relationships change. His interactions with Harry Potter could be completely different. Instead of the constant animosity, he might see Harry as a young boy in need of guidance, like he once was. He could become a mentor figure to Harry, which would rewrite a large part of the original story's dynamic.
His character would become more complex. Naruto is known for his positive and determined attitude. But as Riser, he might have a more egotistical side. He could start to show off his new powers more and be less concerned about the feelings of others at times.
Naruto might become more stealthy and calculating. Mikoto, being an Uchiha, could teach him the art of patience and precision in combat, which would be a contrast to his usual brash and head - on fighting style.
He might be more confident earlier. Since the Namikaze bloodline is associated with great power, Naruto could have a different outlook on his abilities from the start. He may not be as much of an underdog.