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.
Maybe the plot involves Harry Potter (as Loki) becoming a lawyer to deal with the complex laws governing the magical creatures. He might use his Loki - like charm to persuade the magical courts to make more just decisions regarding the rights and regulations of these creatures. For example, when it comes to centaurs' rights to their forest land or house - elves' rights to fair pay.
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.
Well, perhaps Harry could use his magic skills like the Patronus charm to hold Loki at bay. Since Harry has experience dealing with dark forces, he might be able to outwit Loki's trickery.
One possible plot could be that Harry starts to show Loki - like traits early on at Hogwarts. He might use his trickery to outwit his enemies, like the Malfoys. Maybe he even uses some of Loki's shape - shifting abilities in a magical way to get out of tricky situations during his adventures.
One possible plot could be that Loki, reincarnated in the Harry Potter world, is initially confused by his new surroundings. He then discovers that his powers are still there but manifest in different ways in the wizarding world. He might get involved in the fight against Voldemort, not because he's on the side of good, but because he sees an opportunity for chaos and power. Along the way, he forms unlikely alliances with some of the Hogwarts students, who are both intrigued and wary of him. And his presence might also disrupt the normal order of the wizarding world, causing new problems and solutions to emerge.
One possible plot could be that Harry discovers some corrupt practices within the wizarding legal system. As a lawyer, he decides to take on the powerful figures involved. He uses his knowledge of the Dark Arts and the laws of the wizarding world to build his cases. Along the way, he meets new characters, some of whom are trying to stop him while others are eager to help. His Gryffindor courage drives him forward, and he has to balance his personal life, including his relationship with Ginny, with his fight for justice in the legal realm.
The plot could involve a situation where Harry Potter hires a goblin lawyer to fight against the unfair treatment of house - elves in the wizarding world. He might want to use legal means to change the laws regarding their servitude. Since goblins have their own ideas about fairness and legality, the goblin lawyer could be crucial in formulating a legal strategy for this noble cause.
One possibility is that Loki wants to use Harry's magical abilities for his own devious plans in the wizarding world. Maybe he thinks Harry's connection to Voldemort could be exploited to gain power over both the magical and non - magical realms.
Well, it could start with Loki somehow coming across Fem Harry Potter in a dire situation in the wizarding world. Maybe she's being persecuted because of her femininity and her connection to Voldemort in a different way than in the original story. Loki, being the complex character he is, decides to take her under his wing, perhaps seeing some potential in her that others don't.
Another aspect could be his connection to the Norse world. Maybe he gets visited by other Norse deities or creatures. He could be sought after by some of Loki's enemies in the Norse realm who think he's a threat because of his relation to Loki. This would add a whole new layer of danger and adventure to his life at Hogwarts.