His appearance might change a bit too. He could have some Baratheon features, like blond hair and blue eyes. And his personality would be a blend of Naruto's original exuberance and the more solemn and power - hungry nature of the Baratheons. He might be more assertive in claiming what he believes is his right, not just for the sake of others like in the original Naruto story.
Naruto would probably be more politically aware. Growing up as the son of Robert Baratheon, he'd be exposed to court intrigue from a young age. So instead of just being a simple - minded, but kind - hearted ninja, he'd have a shrewd side.
His abilities might be a blend of his ninja skills and the more 'mundane' skills expected of a noble in Westeros. For example, he could use his shadow clone jutsu to attend multiple court meetings at once, while also learning how to joust or fight with a sword like a true Baratheon.
Perhaps the story could focus on Naruto growing up in the court of King's Landing. He would face the political intrigue there, which is very different from the world he knew in the Naruto series. His ninja training might give him an edge in dealing with the backstabbing and power - hungry nobles, while also trying to understand his new identity as Robert Baratheon's son.
He'd be more mischievous. Since Loki is known for his trickery, Naruto would likely have a stronger inclination towards pranks and out - witting his opponents in a more devious way. His normal exuberance would be tinged with a bit more slyness.
Naruto would likely be more confident from the start. Since he has the combined blood of Minato and Mikoto, he might not have the same insecurities as in the original story. He would probably be more aware of his potential and be more self - assured in his abilities.
A possible plot twist might be that Naruto, being the son of Robert Baratheon, has to choose between the values of the ninja world he grew up in and the cut - throat politics of Westeros. He could also have some unique ability inherited from his Baratheon side that changes the whole dynamic of battles in the Naruto - like battles that might occur in this crossover world.
Naruto would likely be more reserved in this fanfiction. Growing up in the Uchiha clan, he would be influenced by their more stoic nature. He might not be as loud and boisterous as in the original story. Also, he would have an in - depth knowledge of Uchiha traditions and values from an early age.
Naruto might be more brooding. Since Nagato had a rather tragic past, Naruto could inherit some of that darkness. He may not be as openly optimistic as in the original story.
Naruto in a 'Naruto son of Maleficent' fanfiction would have a more complex personality. He would still have his determination, but it would be tinged with a sense of isolation. His powers would give him an edge, but he'd also be constantly aware of their 'dark' origin. He may be more in tune with nature, similar to Maleficent's connection to the natural world in her stories. This could lead to him having a different fighting style, perhaps using the elements in a more instinctive and wild way. Also, his relationships would be different. He might have a harder time making friends, as people would be either afraid of him or trying to use him for his powers.
He would be more calm and collected. Iroh's influence would make him think before acting, unlike the sometimes impulsive Naruto in the original series. For example, he might not rush into a fight without a proper plan.
In this fanfiction, Naruto's character would be a blend of his own exuberant self and Itachi's more solemn traits. He would be more perceptive, quickly understanding the motives of his enemies. His growth as a ninja would be faster in some aspects, like his ability to analyze battle situations due to Itachi's influence. He would also have a different relationship with the Uchiha clan. Since he's Itachi's son, they might see him as a symbol of hope or a link to Itachi's true intentions. This would all contribute to a more complex and multi - faceted Naruto character.