Naruto's normally bright and positive personality might become more conflicted. Since Douma has a more complex and often morally ambiguous nature, Naruto would have to grapple with new emotions. He might become more reserved as he tries to figure out how to handle Douma's powers without losing his own identity.
Well, Naruto's personality would be a mix of his own and elements of Douma's. He would likely become more secretive as he tries to hide his true self from those who knew Douma. His cheerfulness would be toned down as he faces the challenges of this new role. He may also start to question some of his own beliefs as he experiences the world through Douma's eyes. However, his core values of friendship and loyalty would still be there, but they might be tested as he has to deal with the more self - centered aspects of Douma's personality.
Naruto might become a bit more reserved. Since Ulquiorra is a rather cold and stoic character, Naruto could start to hold back his more exuberant emotions. He might also become more analytical, like Ulquiorra, when it comes to combat situations. Instead of charging in head - first all the time, he'd think more about the best approach.
His relationship with Sasuke would likely become more complex. Sasuke might initially feel pity for Naruto, but then respect him more as he sees Naruto still being strong despite his blindness. He could become more protective of Naruto, which is a big change from their usual competitive relationship. With Sakura, she would probably be more motherly towards Naruto, constantly worried about his well - being and trying to find medical jutsu to cure his blindness.
Naruto would likely be more refined in his manners. Since he's the son of a queen, he'd probably grow up with a certain level of etiquette. But he'd still keep his core values of never giving up and protecting his friends.
If Naruto becomes involved with Slenderman in a fanfiction, his usually cheerful and determined personality might become darker. He could be more withdrawn as he grapples with the strange and often terrifying aspects of Slenderman's world.
His personality might become more refined. Instead of being the rowdy Naruto we know, he could be more composed and polite due to the influence of the daimyo's court.
He might become more serene. Since Sadaiam might have a calmer and more nature - centered philosophy, Naruto could adopt some of that. He'd be less impulsive in his actions and more contemplative.
Naruto might become more aggressive at first. The influence of Venom could bring out his darker side. But as he gets used to it, he would learn to balance it with his usual positive and determined self.
Naruto might become more calm and collected. Goku has a certain simplicity and focus in his personality. Naruto could pick up on that and not be as impulsive as he usually is.
Naruto might become more reserved. Growing up under Zeltrech, he could be exposed to a more sophisticated and perhaps less rowdy environment compared to Konoha. So instead of his usual loud and brash self, he could develop a more calm and calculated side.
His personality could also become more calculating. Since the Sannin were known for their strategic thinking, Naruto would start to think several steps ahead. He might be more secretive about his plans too. He would no longer be the open - book Naruto. Instead, he would be like Jiraiya, who had his own secrets and plans. He would also show more patience, which is something he lacked before but the Sannin had in abundance when dealing with complex situations.