Harry would likely become more responsible. He'd have to think about someone other than himself all the time.
His character would develop a great deal of maturity. He'd go from a carefree or at least less - burdened person to one with a huge obligation. He would have to learn to be more patient and understanding, especially towards the girl. He'd also need to become more financially aware as he'd be thinking about providing for the baby.
The development could also involve their families getting involved. Harry's family might have different opinions on what he should do. Some might be supportive while others could be disappointed. The girl's family could also play a big role, perhaps pressuring Harry to take certain actions or providing support to the girl. There could be family meetings, arguments, and reconciliations, all of which would shape the direction of the story.
He'd become more empathetic towards creatures other than humans. Naruto is already kind - hearted, but having a Pokémon would expand his understanding of different species.
His character would likely become more complex. With the Tenseigan's power, he would face new challenges and responsibilities.
Harry would likely become more empathetic. Since he'd be seeing things from his mother's point of view, he'd understand the emotions and struggles that others go through better. For example, if Lily had memories of dealing with difficult classmates, Harry could use that to be more understanding of his own peers at Hogwarts.
Well, initially, Harry would probably be a very obedient and loyal follower of Voldemort. He would be trained to be ruthless and efficient in using magic for Voldemort's purposes. But as he gets older, he may start to have doubts. Maybe he witnesses Voldemort's cruelty towards innocent people. This could make him question his loyalty. He could then start to explore his own identity outside of being Voldemort's protege. He might secretly study different types of magic that Voldemort has shunned, like healing magic. And through these experiences, his character could transform from a dark - influenced young wizard to one who wants to find his own path and perhaps even redeem himself in the eyes of the wizarding community.
His confidence would likely skyrocket. With the new powers from the Ultimatrix, he'd be able to take on challenges more boldly. He might become more independent as he explores the abilities on his own.
If Naruto got a kekkei genkai, his confidence would likely skyrocket. He's always been the underdog, and this new power would make him feel like he's on a more equal footing with his peers. He might become a bit more reckless at first, eager to test out his new abilities in battle.
His character would likely become more empathetic. Since he's now in a female body, he might start to understand the struggles that girls face in that world. This could make him more sensitive to the feelings of others.
Naruto's confidence would likely soar. Having wings gives him a new and unique ability that sets him apart. He might become more adventurous, eager to explore new areas that his wings can take him to. His sense of responsibility could also grow as he realizes he has a new power to protect his village. He could use his wings to quickly respond to threats from afar.
The plot could develop with Natsu and the girl initially in shock. Then they might start making plans for the future, like finding a place to live. Natsu could also try to earn more money for the upcoming baby. Their friends would likely get involved, some offering help and others maybe being a bit skeptical.