He could also become more cautious. If his dad is into Aizen's ways, Naruto might be more aware of the potential for deception and hidden motives in others. This could make him a more astute ninja, but also a bit more paranoid. For example, he might be more hesitant to trust new allies right away.
His relationship with Sasuke could change. Sasuke might be more suspicious of Naruto. Since Aizen was known for his duplicity, Sasuke could think Naruto is hiding something big from him. Their rivalry could take on a different tone, more of a distrust - filled one.
The Soul Reapers would be very confused at first. They are used to Aizen being a certain way, and Naruto's different personality would be a shock. Ichigo might be curious and see Naruto - Aizen as an ally against the common enemies. Orihime could be one of the first to trust Naruto - Aizen because of his kind - hearted nature that she would sense. And the Espadas would probably be on high alert, not knowing what to expect from this new Aizen.
Naruto would probably be very cautious around Aizen at first. He's used to facing powerful enemies, but Aizen's deceptive nature would be a new challenge. Aizen, on the other hand, might see Naruto as an interesting specimen, someone with a strong will and great power that he could potentially manipulate.
One possible plotline could be that Naruto's dad, who is an Aizen fan, tries to incorporate some of Aizen's leadership or strategic thinking into his own actions in the Naruto world. Maybe he uses Aizen - like deception in battles but for good purposes, like fooling the enemy to protect the village.
They might have a mentor - student relationship. Aizen, with his vast knowledge and power, would be in the position of a mentor, guiding Naruto. Naruto, being eager to learn and grow stronger, would be the student. However, there could be some tension as Naruto has his own sense of justice which might conflict with Aizen's more self - serving motives at times.
His friends might be a bit jealous at first. After all, Naruto is suddenly so interested in the Raikage. But they would also be supportive as they know Naruto is always looking to grow stronger. For example, Sasuke might be initially suspicious but then see the potential in Naruto learning from the Raikage.
The storyline could start with Naruto somehow ending up in Aizen's world. At first, he would be confused and on guard. But as he gets to know Aizen, he might see some potential in him. Naruto would try to change Aizen from the inside. Aizen, on the other hand, might see Naruto as a useful tool or an interesting experiment.
With his other friends like Choji and Kiba, they might see Naruto as even more of a leader. The Sharingan is a symbol of great power, and Naruto obtaining it could inspire them to train harder. However, they might also feel a bit of a distance at first, as Naruto now has a power that is quite different from what they have. But overall, Naruto's positive nature would likely help him maintain strong relationships with his friends as he'd assure them that he'll use the power for good.
It could bring them closer. Having to learn and speak English together would mean they rely on each other more. They would share the struggles and the joys of mastering a new language, which would strengthen their bond.
Naruto's personality might become more serious. Since Asura Otsutsuki is from an ancient and powerful clan, his influence could make Naruto more aware of the greater responsibilities and the bigger picture in the ninja world.