If Harry joins BAU in fanfiction, his character would experience a major transformation. His skills in magic would need to be adapted to fit within the legal and ethical boundaries of the Muggle world. He'd start to rely more on his intelligence and deductive reasoning rather than just magic. His experience with the BAU would also make him more confident in dealing with non - magical threats. He might start to see the similarities between the wizarding and Muggle worlds in terms of the presence of evil, and this would make him more determined to fight crime in both worlds.
Harry Potter would probably develop a stronger sense of justice in the context of the BAU. In the wizarding world, justice was often about good versus evil in a very clear - cut way. But in the BAU, the lines can be more blurred. He'd have to learn to understand the complex motives of criminals. His relationships with the BAU team members would also shape him. He'd learn from their different perspectives and become more empathetic towards Muggles and their problems.
If Hermione joins the BAU in fanfiction, her character would develop in many ways. Firstly, her knowledge base would expand as she learns about forensic science and modern - day criminal psychology. Her magical knowledge would start to blend in unique ways with her newfound skills. Emotionally, she'd become more resilient. Dealing with the horrors of some of the cases would toughen her up. Socially, she'd learn to communicate in a more direct and less academic way, which would be a big change for her. She might also start to see the world in a more grey - area way rather than the more black - and - white view she had in the wizarding world.
Harry's character would develop in many ways if he joined the army in fanfiction. He'd have to learn to trust his new comrades as much as he trusted his Hogwarts friends. His sense of justice would be put to the test in different scenarios. For example, in the wizarding world, he was fighting against pure evil in the form of Voldemort. In the army, the lines between good and bad might be more blurred. This would force him to think more deeply about what he's fighting for and make him a more complex and mature character.
His character could become more rebellious. He might start to question the rules of Hogwarts and the wizarding world in general. For instance, if the gang has a disdain for the Ministry of Magic's regulations, Harry could be influenced to think the same way. This would be a big change from his usually rule - following self, at least when it comes to the good rules.
His character would become more disciplined. The Marines' training would shape him further.
His character might become more worldly. At Hogwarts, he was mainly dealing with the wizarding world's problems. But in Shield, he'd be exposed to a whole new set of challenges and cultures, which could make him more adaptable and open - minded.
His character would become more hardened. The Grey Wardens face a lot of death and danger, which is different from Hogwarts. So he'd be less naive about the world.
He would likely become more hardened. The Grey Wardens face constant danger and hardship, so Harry would have to toughen up. His view of the world would expand as he gets involved in a different kind of fight against evil.
If Harry joins the Varia in fanfiction, his character would undergo a substantial transformation. His moral compass might be adjusted as he is exposed to the Varia's different ethical code. He might become more ruthless in combat situations, as the Varia are not as restrained as the wizarding world in terms of using force. His relationships would also change. He would no longer be surrounded by his Hogwarts friends, but by a group of tough - minded individuals. This would force him to communicate and interact in new ways. His identity would shift from being mainly a wizard from Hogwarts to being a member of the Varia, which would influence his self - perception and how he presents himself to the world.
His character might become more adaptable. In Rias's peerage, he'd face different challenges and cultures compared to the wizarding world. So he'd have to learn new ways to interact and fight.
Well, one possibility is that Harry could use his magic skills in a discreet way to help the BAU team. For example, he could use a spell to make a suspect more talkative during an interrogation. Another could be that his experience with the dark arts and fighting Voldemort gives him an edge in understanding the motives of really evil criminals that the BAU might be hunting. He might also introduce the team to magical creatures that could be used as analogies for certain criminal behaviors.