His relationship with Hermione would likely strengthen. She would be intrigued by his newfound heritage and would help him research more about Gryffindor. Ron, on the other hand, might feel a bit of envy at first but would soon get over it and be proud of Harry. With Dumbledore, Harry might have a more equal relationship as he is now the heir of one of the founders. Dumbledore could share more secrets with him. And with the Slytherins, they might view him with more respect or fear as he is the heir of Gryffindor, which could change the dynamic in the whole school.
His relationship with Ron would be very different. Ron might be initially distrustful or even hostile towards Harry in Slytherin. But as the story progresses, they could come to understand each other better. Harry's relationship with Hermione could also change. She might be more cautious around him at first, but then realize that Harry is still the same person deep down. And his relationship with Draco would be much more complex. They could start as rivals, but then become allies in some situations, as they both have a connection to Slytherin.
If Harry was in Slytherin, his relationship with Ron would be very different. Ron, with his Gryffindor - Slytherin prejudice, might initially be hostile. But over time, they could come to understand each other better. His relationship with Hermione might also change as she might see him as a project to 'reform' in Slytherin. With Draco, there could be a more complex dynamic as they are in the same house now.
His relationship with Hermione would likely change. Hermione is used to the human Harry, but now she has to deal with a phoenix - form Harry. She would probably be very curious and start researching immediately about any historical cases of humans turning into phoenixes. Ron, on the other hand, might be a bit more hesitant at first. He's used to the regular Harry and this new form might seem a bit strange to him. But overall, his friends would be protective of him. They would want to make sure that he is safe in this new form and not exploited by those who might want to use his phoenix powers for their own gain.
His relationship with Hermione would be very different. Hermione, who is an advocate for house - elf rights, would be in a strange position. She might try to help Harry break the spell, but also be conflicted about treating him like a normal house - elf. With Ron, Ron might not take Harry as seriously at first in his house - elf form, but then realize that it's still Harry and they need to work together. And with Snape, Snape would probably be even more dismissive of Harry as a house - elf, but Harry would still find ways to get under his skin.
With Dumbledore, it would be a complex relationship. Dumbledore would be cautious yet intrigued by Harry. He would want to guide Harry away from the potentially dark path that his Nathrezeim upbringing could lead him to. Harry, on the other hand, might be resentful of Dumbledore's interference at first.
His relationship with his enemies would change significantly. Voldemort or his Death Eaters might not recognize Harry as a rabbit at first, which could give Harry an advantage in some ways. However, if they did find out, they might see it as an opportunity to either capture or harm him more easily. Among his friends in Gryffindor, they would all be very concerned. Neville, for example, might try to use his knowledge of Herbology to find a way to reverse the transformation. And Ginny would be especially protective, seeing Harry in such a vulnerable state as a rabbit.
Some of the more traditional wizarding families, like the Malfoys, would likely oppose Harry's actions. They have always held a certain view of the goblins as being inferior. This would further widen the gap between Harry and those who uphold such old - fashioned and discriminatory views. However, among the younger generation of wizards who are more open - minded, Harry's actions could inspire them to re - evaluate their own views on the goblins, and he could gain new friends and supporters from this group.
His relationship with Dumbledore would likely be more complex. Dumbledore would need to guide Harry in understanding and controlling his dragon - influenced powers. Hermione might be both fascinated and a bit jealous of Harry's new - found abilities, but still be his loyal friend and help him research about his heritage.
His relationship with Hermione and Ron would likely become strained at first. Since he's at a different school, they wouldn't be able to see each other as often. Hermione might be a bit jealous that Harry is experiencing a different magical education. With new friends at Beauxbatons, Harry could form a close bond with a French student who has a very different view on magic. This new friend could introduce Harry to new spells and ways of thinking that he hadn't considered before.
Well, Harry Potter himself could be a possible heir. He already has so many Gryffindor - like qualities. His courage and loyalty make him a strong candidate.