If raised by Calypso, Harry's character would be very different. His view of family would be centered around Calypso, and he would have a different understanding of loyalty. He would be more connected to the sea and nature in general. His magic would have a different flavor, perhaps more wild and less refined in the traditional Hogwarts sense. He might be more self - sufficient, having grown up in a more isolated environment. Also, his approach to dealing with threats like Voldemort would be unique, as he would draw on the magic and wisdom he learned from Calypso rather than just the typical spells taught at Hogwarts.
Harry would likely be more wild in a sense. Dragons live by their instincts, and he'd pick up on that. His magical abilities could be more primal. Instead of relying on the spells taught in Hogwarts, he might use magic in a more raw and unrefined way. Also, his sense of loyalty might be more towards the dragons rather than the wizarding community initially.
He would be more refined. Royal upbringing would instill in him a sense of propriety and elegance that he lacks in the original story.
Harry would have a different view of leadership. Instead of just being a hero who reacts to threats, he would be more proactive in shaping the wizarding world. Lelouch's influence would make him see the importance of having a vision for the future and using all means necessary to achieve it. He would be more strategic in his approach to fighting against Voldemort and the Death Eaters, perhaps even trying to turn some of them to his side rather than just fighting them head - on.
If Harry was raised by Potter elves in fanfiction, his character would be very different in several ways. Firstly, his sense of family would be much broader. The elves would be like his extended family, and he would have a deep - rooted loyalty to them. This would make him more inclusive when it comes to making friends at Hogwarts. Instead of just sticking to the Gryffindors, he might befriend students from all houses. Secondly, his relationship with power would be different. The elves don't seek power in the way wizards do. So, Harry would be less interested in fame and more interested in using his magic for the good of all. He would be more of a behind - the - scenes helper rather than a spotlight - seeking hero. And finally, his understanding of magic would be more practical and down - to - earth. Elves use magic for daily tasks, and Harry would learn this kind of magic first. So, when he goes to Hogwarts, he might be able to solve problems in a more unorthodox but effective way compared to the other students.
He would be more cynical. Demons are not known for their positive outlooks. So Harry might not trust easily. He'd also likely be more aggressive in achieving his goals, as demons often value power and dominance. His view of magic would be more skewed towards the dark arts.
He might be more laid - back. Irish culture has a certain charm and easy - going nature, so Harry could be less uptight than in the original. He could also be more superstitious due to Irish folklore.
He'd likely be more attuned to the darker aspects of magic. Since the Hel Gods are associated with darker realms, Harry might not shy away from what's considered 'dark magic' as much as in the original story. He could be more of an outcast among the regular wizards who fear his different upbringing.
Harry would be more territorial. Goblins are known to be possessive of their spaces and belongings. So, Harry would probably be very protective of his personal space and things. Also, his sense of justice might be different. Goblins have their own rules and laws, and growing up with them, Harry would view right and wrong from a goblin - centered perspective rather than a wizard - centered one.
He'd be colder, in terms of personality. Mr. Freeze's influence would make Harry less warm - hearted perhaps.
He'd be more animalistic. He might move on all fours more often and be more comfortable in the wild. His communication skills could be more primal, using grunts and gestures at first.