If Harry became a succubus, his magical abilities would transform. He could gain the ability to influence others' emotions on a deeper level. His personality might become more complex as he tries to balance his old self with the new instincts of a succubus. He may also become more isolated as some in the wizarding world might fear or misunderstand his new form. But at the same time, he could also find new friends who are more accepting of his unique situation.
If Naruto became a succubus in fanfiction, his relationships would change significantly. His friendship with Sasuke, for instance, would face a new dynamic. Sasuke, who is often focused on power, might view Naruto's new form as either a threat or a potential source of power. Naruto's relationship with Sakura could also be affected. Sakura might initially be shocked and unsure how to interact with him. She could be worried about Naruto's new nature and how it could impact his well - being. And Naruto's relationship with Kakashi would require some adjustment. Kakashi would need to understand Naruto's new abilities and how to help him control them while still maintaining their mentor - mentee bond.
He would become more rebellious. Harry has always had a bit of a rebellious streak in the original series, but as a pirate, it would be amplified. He'd be more likely to question authority and do things his own way without waiting for permission.
His character would likely become more brooding. The new half - demon nature might bring out a darker side of him. He would be more solitary as he tries to understand his new self.
Harry would change a great deal. He'd be more calculating. His decisions would no longer be based on what's right or wrong in a traditional sense, but on what benefits his mob empire. He might also become more secretive, hiding his true intentions from those around him. His relationships would change too. He might not trust people as easily as he used to, always suspecting ulterior motives. His view of magic would also shift. Instead of seeing it as a tool for good, he could start to use it as a means of intimidation and coercion.
He would probably be more otherworldly. Harry might have an air of mystery around him that the original Harry didn't have. His actions could be more guided by a sense of divine purpose.
He would likely become more conflicted. Harry, who was always on the side of good, would now have to deal with this dark lineage. He might be more withdrawn as he tries to come to terms with it.
He would probably be more in tune with nature. Instead of just having a connection to Hedwig, he might be able to communicate with all kinds of animals. So he could be more of a naturalist wizard.
If Harry grew a beard in a fanfiction, his personality could also shift a bit. He might become more introspective. The beard could be a physical manifestation of his inner growth. He could be less impulsive, taking more time to think things through, like an old wizard who has seen it all. Also, he might be more reclusive, using the beard as a sort of barrier between himself and the outside world that has always had such high expectations of him.
He would become more of a space - faring leader. His focus would shift from the wizarding world on Earth to the cosmos. He'd probably be more open - minded about different cultures and species, just as he was about different wizarding houses at Hogwarts.
He would likely be more conflicted. Harry was always a morally upright character, but with Thanos as his father, he'd have to battle inner demons. He might be more powerful physically and have a darker side to his personality that he constantly has to keep in check.