A Diana Prince and Harry Potter love fanfic is quite an unusual concept. In such a fanfic, there would be many challenges in terms of bringing their two very different worlds together. Their different powers, cultures, and storylines would need to be carefully woven. However, if done well, it could be a very engaging read. For example, the idea of Diana being attracted to Harry's courage and his magic, and Harry being in awe of Diana's strength and beauty could be the basis for a romantic plot.
The plot could involve a prophecy that links their two worlds. Diana Prince might be sent to the wizarding world to protect Harry Potter because of this prophecy. As they spend time together, they start to develop feelings for each other. Along the way, they face challenges from both the magical and non - magical threats, like Death Eaters and some of Diana's enemies from her own world.
The Grangers. Hermione's parents are Muggles, but if they were made aware of the wizarding world early on, they could adopt Harry. He'd have a stable, loving home environment and would also be exposed to Muggle knowledge, which could be really useful in his magical studies. For example, scientific methods could be applied to understanding some aspects of magic better.
Maybe the prince is from a neighboring magical country. For example, he could be from a place like Beauxbatons or Durmstrang. He comes to Hogwarts on an exchange program of sorts and that's where he meets Harry and decides to court him. This would add an element of international magical relations to the fanfic.
Well, in a 'Harry Potter adopted by Delacours' fanfic, it could be really interesting. Harry would be part of a family that has a different set of values and customs. The Delacours might train him in unique ways of magic that are more in line with Beauxbatons. He could get to know the Veela heritage better, and perhaps it would give him some advantages in his magical abilities. Also, there could be new storylines around his interactions with the Delacour family members and how they deal with the fame and danger associated with Harry.
One possible plot could be that Marge, despite her initial rough exterior, discovers a soft spot for Harry. She might start to teach him some of her own values, which could be a mix of traditional and rather strict ones. Harry would have to adjust to living in a new environment with Marge's dogs and her no - nonsense attitude.
In this fanfic, perhaps Harry Potter is orphaned in a different way than in the original story. Goku stumbles upon him and, not really understanding the concept of magic at first but sensing Harry's good heart, takes him in. Harry would be introduced to Goku's friends like Bulma and Krillin. Bulma might be fascinated by Harry's magic and try to find a way to combine it with her technology. As for Harry, he'd have to adapt to a very different world. Instead of Hogwarts, he might train at Kami's Lookout. And his relationship with Goku would be one of a son - father figure, with Goku teaching him important values like never giving up and always protecting the weak, which would also tie in with Harry's own nature of fighting against evil in the wizarding world.
Well, it would be really interesting. Harry would probably be in awe of the high - tech gadgets the Avengers have. Iron Man might take him under his wing and upgrade his glasses to something more like his own high - tech eyewear. And Harry's experience with fighting dark magic could be useful to the Avengers when dealing with otherworldly threats. Maybe he'd even teach them some basic spells for self - defense.
Obviously, Harry Potter is one of the main characters. He is the one being adopted into the Greengrass family. Then, the Greengrass family members are important. There are likely to be the parents of the Greengrass family, and the Greengrass sisters. We might see Astoria Greengrass and her sister (if she has one in the fanfic). These characters will play significant roles in Harry's new life and the development of the story.
You can find 'Harry Potter adopted fanfic' on some popular fanfiction websites like FanFiction.net. It has a large collection of fan - created stories, and you can simply search for 'Harry Potter adopted' in the search bar. Another good place is Archive of Our Own (AO3). It's known for its wide range of fanfiction, and you're likely to come across many great 'Harry Potter adopted' stories there as well.