His character would be more adventurous. Gandalf is always on quests, so Harry would be used to traveling and facing new challenges. He'd be braver and more self - reliant.
Well, in such a fanfiction, Harry might grow up with a much different set of magical knowledge. Gandalf is from a very different magical world than the one in Harry Potter. He could teach Harry about more ancient and elemental magics. Harry might also become more of a wandering wizard, like Gandalf, rather than being tied to Hogwarts. He could be more involved in battles against large - scale dark forces from a very young age.
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.
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.
He would be more independent. Goblins are self - reliant, and Harry would likely pick up this trait. He would not be as reliant on others for help as he is in the original story. His view of power would also change. Instead of seeing power in terms of magic alone, he would understand the power that comes from wealth and influence within the goblin community, which could make him more politically astute.
His character would likely be more hardened. Growing up with the Akatsuki, he'd be exposed to a lot of tough situations and battles early on. This would make him less naive compared to the original Harry. He might be more cynical about the idea of pure good and pure evil, having been around the Akatsuki who operate in a more morally complex world. Also, his sense of loyalty might be different. While he'd still value his friends, it might be in a more guarded way as the Akatsuki don't always trust easily.
Growing up with Zatanna, Harry would develop a stronger sense of showmanship in his magic. He may not be as reserved when it comes to displaying his magical abilities. Also, Zatanna's moral code, which may be different from what he would have learned at Hogwarts, could shape him into a wizard with a more fluid view of what is right and wrong in the magical world. This could lead to some interesting conflicts and decisions as he grows older and faces the challenges in the wizarding world.
He'd probably become more reserved. Growing up with the Cullens, who are often cautious and secretive, he'd pick up on those traits. His Gryffindor courage might be tempered with the Cullens' more calculating approach to life.
In this fanfiction, Harry's character would develop in a very different direction. He would likely be more of an outcast. Growing up with a Nundu, he wouldn't have the normal social interactions a wizard kid has. So, he could be more withdrawn and less communicative. But at the same time, he would be very self - reliant and have a strong survival instinct.