In the fanfiction, the heir of Dracula would stand out from other Harry Potter characters significantly. Their origin story is rooted in a much darker and more ancient lore compared to the wizarding families. They would have an entirely different relationship with death. While most wizards fear death and use magic to prolong life or protect against it, the heir of Dracula might have a more complex view, perhaps seeing death as a part of their vampiric cycle. Their powers would be more related to the night and shadow, like being able to move undetected in the dark or having a sense of other creatures of the night. This would make them a very unique and somewhat alien presence in the otherwise more 'normal' wizarding world of Harry Potter.
The descendant would likely have a darker and more complex personality. Klaus is often associated with dark and powerful magic, so the descendant might have a natural inclination towards that. They would be different from the typical Hogwarts students who grow up in a more traditional wizarding family environment. For instance, they might be more secretive and less trusting.
Fem Harry Potter would likely be initially cautious around Dracula. Given her experiences with dark forces in the wizarding world, she'd approach him with wariness. But as she gets to know him, she might find common ground in their knowledge of different forms of magic.
He would be different in that he'd have access to lantern powers. Instead of relying solely on his wand and magic spells, he'd be using the power of the lantern. His confidence might grow even more as he discovers the vast potential of these new powers.
A 'Loki is Harry Potter fanfic' would be different because it combines two very different fictional universes. While other fanfics might stay within the Harry Potter world or focus on just one set of characters, this one would bring in Loki's unique personality and powers. For example, Loki's ability to deceive and manipulate would add a new layer of intrigue to the usually more straightforward relationships in the Harry Potter world.
She would be much more aggressive. While Harry was brave and sometimes impulsive, her aggression would come from her Ares heritage. She might be quicker to use force rather than diplomacy or cleverness like Harry often did.
Well, Harry could be more confident in his own power. In the normal series, he had doubts about his abilities at times. But in this scenario, if he's set on destroying Snape, he has to be certain of his magic. He would be more decisive, not hesitating to use his skills against Snape. Also, his relationships with other characters might change. Some might see him as too aggressive in his pursuit of Snape, while others might support him wholeheartedly, creating a divide among his friends.
Harry himself could be more of a mechanic - wizard. He might wear goggles and have a toolbelt with magical tools that look like steampunk gadgets. His glasses could be enhanced with steampunk tech to see magical auras better.
Hermione would probably be fascinated by the new magical knowledge that comes with the Japanese - influenced setting. She might be seen studying ancient Japanese spells and trying to find connections between them and the ones she already knows. And she might be wearing a kimono in a more proper and traditional way compared to the others.
Harry would be different in that he'd have to master both wizardry and shinobi skills. He'd be more stealthy and agile, like a shinobi. Instead of just relying on his wand, he'd also use ninja weapons. Hermione would probably study both shinobi techniques and magic with equal enthusiasm, making her even more of a know - it - all, but in a cool way. Ron might struggle a bit more to adapt as he's used to the traditional wizarding ways, but he'd also become more physically capable.
It changes it a great deal. For one, Harry's origin story gets a major rewrite. Instead of just being a wizard orphan, he now has a connection to Dracula. His abilities would likely be different. He might not just rely on his wand for magic but also have inborn vampiric powers like super speed or the ability to hypnotize. His friends might view him differently too, perhaps with a bit of fear or wariness.