How would Harry Potter's character develop as an EDS Ambassador in a FMA and Harry Potter fanfiction?

One idea could be that Harry Potter uses his magical skills and experience in the wizarding world to promote understanding between the different species in the FMA universe as an EDS Ambassador. He could use spells to help with communication barriers, for example.

In a fanfic with this crossover, the interaction of the magic systems would be a central and fascinating aspect. Alchemy in FMA has its own set of rules and limitations, as does magic in Harry Potter. When it comes to the Boggart, the Harry Potter characters rely on their spells and the power of their minds to change the Boggart's form into something humorous. Edward, with his EDS status, could bring in the concept of equivalent exchange. Maybe he could offer something in exchange for the Boggart to leave or change its form in a more permanent way. And the magical energy in the Harry Potter world could interact with Edward's alchemy. It could either disrupt it if they are too different, or it could merge in some ways, allowing for new and creative ways to deal with threats like the Boggart.

One popular fma Harry Potter crossover fanfiction might involve Ed's unique alchemy skills being transferred to the Harry Potter world. For example, he could use his knowledge to create magical items in a different way than the wizards are used to. Another aspect could be how Ed, as an ambassador of sorts, tries to bridge the gap between the two very different worlds of Fullmetal Alchemist and Harry Potter, perhaps leading to some interesting cultural exchanges within the story.

Harry's character would become more centered around self - improvement. Goku is always striving to get stronger. So Harry would constantly be looking for ways to improve his magical and physical skills. He might not be as reliant on his friends for support in difficult situations as he is in the original story, instead trying to handle things on his own more often. This could make him seem a bit more independent and self - sufficient.

His character would likely become more edgy and darker. Growing up with demons, he'd be exposed to a lot of negative and cruel things, which would change his view of the world.

He might be more solitary at first. Since ghosts are not as social as living beings in the traditional sense, Harry could be used to his own company. But as he gets to know the living world more, he would start to open up.

His character would likely be much more aggressive. Trigon's influence would push Harry to be more assertive and less hesitant. He'd probably have a quicker temper too.

His character would be more assertive. He'd be used to taking action quickly due to his Warrior upbringing. He might be less hesitant in difficult situations compared to the original Harry.

His character might become more confident and authoritative. Being a king, he has to make decisions for a whole nation, which would force him to be more assertive than he was at Hogwarts.

He'd likely be more inquisitive about different forms of magic. Instead of just relying on the spells taught at Hogwarts, he'd constantly seek out new magus - based knowledge.