One great Auror Harry Potter fanfiction is 'The Auror Files of Harry Potter'. It shows Harry's life as an Auror, dealing with new dark threats. Another is 'Harry Potter: Auror in Training' which focuses on his early days in the Auror training program.
It could also include some new characters created specifically for the fanfiction. For example, a tough and experienced auror who becomes Harry's mentor and teaches him some advanced techniques. Or a young, talented witch or wizard who Harry takes under his wing as a trainee. These new characters can add new dynamics to the story.
There's 'Aurors in Training'. This fanfiction focuses on Harry and Draco's early days as Auror trainees. It's full of action scenes where they learn to use magic in combat situations. The story also delves into their complex relationship as they compete and sometimes cooperate with each other.
Hermione would be a great ally. With her vast knowledge of magic and her logical thinking, she could help Harry solve complex cases. Ron could also be an ally, using his loyalty and his own skills in combat and magic. Neville might be another one, having grown into a confident and powerful wizard, he could bring his unique skills in herbology and his courage to the Auror department to support Harry.
One common theme is redemption. Harry often tries to redeem some of the minor villains he encounters as an Auror. Another is friendship. His relationships with Ron and Hermione continue to be important even in his Auror days.
Another plotline might be Harry training a group of new aurors. He could pass on his unique experiences and skills, while also dealing with the challenges of different personalities and abilities among the trainees. This would not only show his growth as an auror but also his leadership skills.
One key characteristic is the relationship development between Harry and Draco. In the context of being Aurors, they could have a begrudging respect for each other at first, which then turns into a deeper friendship or something more. The setting also matters. A vivid description of the Auror department, its rules, and the overall wizarding society makes the fanfiction more immersive. Also, the writing style should be engaging, not too dry or overly flowery, so that readers can easily follow the story of these two characters in their Auror roles.
A new dark wizard who has emerged from the shadows, someone who idolized Voldemort and is trying to pick up where he left off. This antagonist could be using new and more insidious magic that Harry has to figure out how to combat as an Auror.
One possibility could be Harry facing a new dark wizard threat that the Ministry is trying to keep under wraps. As an Auror, he stumbles upon some clues and has to work in secrecy to figure out what's going on before it's too late.
One great 'Auror Harry Potter Twilight' fanfiction is 'Twilight in the Wizarding World'. It combines the magic of the Harry Potter universe with the allure of Twilight's vampires and werewolves in a really interesting way. The author does a good job of making Harry an Auror in this new setting, dealing with threats that are a blend of both worlds.