Luna Lovegood might be an unexpected but interesting choice. She has a unique perspective on the wizarding world. While she may seem a bit eccentric, her ability to think outside the box could be useful in a courtroom. She could come up with creative defenses for Harry, and her calm and dreamy nature might be able to sway a jury or judge in Harry's favor.
An older wizard like Alastor Moody (if he were still alive and in his right mind) could be a good lawyer for Harry. He has a long experience in the wizarding world, knows all the tricks of the Dark wizards, and would be able to use his knowledge to protect Harry. He's also not afraid to bend the rules a bit to get the job done, which could be both an advantage and a disadvantage, but overall, he could be a formidable legal representative for Harry.
Hermione Granger could be a great candidate. She is extremely intelligent, has a deep understanding of the wizarding laws (from all her studies), and is very determined. She could use her knowledge to fight for justice as a private lawyer. Her Muggle - born background might also give her an edge in dealing with situations that require a different perspective from the traditional wizarding view.
It could be Hermione. She's always been very book - smart and she could have decided to study law in the wizarding world. She already has a great understanding of the rules and regulations at Hogwarts, so it would be a natural progression for her to become a lawyer. And she would be very dedicated to helping Harry with any legal issues.
There could be an entirely new goblin character created just for this fanfiction. This goblin lawyer could be an outcast from the goblin community because of his more progressive views on wizard - goblin relations. Harry, seeing his potential, hires him to help with his legal battles that require a fresh perspective.
The main character could be Hermione Granger. Since she is very intelligent and has a strong sense of justice, she could easily be re - imagined as a lawyer. She could use her vast knowledge of magic and her quick thinking to bridge the gap between the two worlds and help the Avengers out. For example, if there was a spell that was being misused in the Avengers' world, she could figure out how to stop it legally.
Hermione Granger could be a common character. Given her intelligence and knowledge of the wizarding world laws (she's always reading), she could easily be imagined as a brilliant lawyer. She would use her quick thinking and vast magical knowledge to build strong cases.
Well, perhaps Harry Potter, in the guise of Loki, uses his trickery skills in the wizarding legal system. He could be defending those wrongly accused of using dark magic, like using his shape - shifting abilities to find evidence that others can't.
One possibility could be that Harry Potter hires a lawyer to deal with the legal mess left behind by the wizarding wars. For example, he might need help in getting proper compensation for the damages done to the wizarding community. The lawyer could be a Muggle - born wizard who has knowledge of both worlds' legal systems and uses that to fight for the rights of those affected.
One possible plot could be that the lawyer helps Harry deal with the legal aftermath of the Battle of Hogwarts. There might be issues regarding the rebuilding of the wizarding world, and the lawyer could ensure that Harry's rights and the rights of his friends are protected during this process.
If Harry Potter meets his lawyer in fanfiction, it could be really interesting. The lawyer might be a Muggle - born wizard who has a very different view on magic laws. He could introduce Harry to new ways of thinking about the laws in the wizarding world. For example, he could point out that some of the old pure - blood - favored laws are actually discriminatory and need to be changed. And Harry, with his influence, could start a movement to reform the wizarding legal system.
Well, perhaps the lawyer character could be a Muggle - born in the Harry Potter world who is a huge Avengers fan. They somehow end up in a situation where they have to use their lawyering skills to represent the Avengers against some sort of magical - technological threat that combines elements from both universes. They might argue about who has the right to certain magical artifacts that are now in the hands of tech - savvy villains.