One great Harry Moody fanfiction is 'The Adventures of Harry Moody'. It shows Moody in some unique and exciting situations that really bring out his character. The author does a great job of staying true to Moody's personality as we know it from the original series.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including ones related to Harry Moody. Just use the search function and type in 'Harry Moody' to find relevant stories.
I really like the fanfiction 'In Moody's Shoes'. It takes the reader on a journey through Moody's eyes. You get to experience his paranoia, his skills as a wizard, and his complex relationship with the Order of the Phoenix. It adds a lot of depth to his character and is a great exploration for any 'Harry Potter' fan interested in Mad - Eye Moody.
Another good character to pair with Moody might be Sirius Black. Given their both having experience with the dark side of the wizarding world, they could team up in a fanfiction to take on some new threat or solve a long - standing mystery that has to do with the dark wizards.
One interesting Moody fanfiction could be where he mentors Harry in a more in - depth way outside of the classroom. It might explore Moody's past experiences with dark wizards and how he imparts that knowledge to Harry for future battles.
The mystery surrounding Mad - Eye Moody makes fanfiction appealing. In the original series, he had a lot of secrets. Fanfiction allows us to explore those secrets further. For example, we can imagine what he was really thinking when he was teaching at Hogwarts.
One possible motive could be a severe misunderstanding. Maybe Harry is tricked into believing that Snape and Moody are involved in some dark plot against him or his friends. For example, if there were false evidence planted that made it seem like they were working for Voldemort again. Another reason could be that he was under the influence of a powerful dark magic that clouded his judgment and made him act out of character.
Harry would likely be more gruff and less trusting. Growing up with Moody, who was always on guard, Harry would have learned to be more cynical. He might not be as quick to make friends as he was in the original story.
Harry would be more cautious. Moody's paranoia would rub off on him. He'd be constantly on guard, not as quick to trust people like in the original series. For example, when he meets new classmates, he might be sizing them up for potential threats instead of being friendly right away.
The reaction would also depend on how the events leading up to these actions were presented in the fanfiction. If it was made clear that Harry was acting in self - defense or to protect the wizarding world from a hidden threat, some might come to his side. But overall, it would create a huge upheaval in the wizarding world. The Ministry of Magic would be under pressure to take action, and there would be a lot of unrest among the students at Hogwarts who looked up to both Snape and Moody in different ways.