Maybe Mad - Eye Moody could be involved too. Even if he's a bit of a complex character. His vast experience in dealing with dark wizards and his paranoia - which actually might be a strength in some cases - could make him a key Auror in the fanfiction. He would be very cautious and thorough in any investigation Harry Potter calls them for.
Well, it could be about Harry sharing his knowledge and skills in casting the Patronus charm with the Aurors. Maybe he's helping them overcome some dark magic threats that require the use of the Patronus for protection or defense.
One popular 'Basilisk Harry Aurors' fanfic might be 'The Basilisk's Legacy'. It could explore Harry's encounter with a basilisk in a new light and his journey as an Auror dealing with the aftermath. Another could be 'Harry and the Basilisk's Bond', where Harry forms an unexpected connection with the basilisk while training to be an Auror.
Obviously, Harry is one of the main characters as he is the one doing the teaching. And the Aurors are also main characters since they are the ones being taught the Patronus charm.
In fanfiction, the 'Basilisk Harry Aurors' concept often combines Harry's past encounter with the basilisk with his future as an Auror. For example, his knowledge of the basilisk's abilities, like its deadly stare, could be used in his Auror work. He might develop a way to counter similar dark magic threats based on what he learned from the basilisk.
Well, one interesting scenario could be Harry Potter calling the Aurors to deal with a group of dark wizards causing chaos in Diagon Alley. The Aurors arrive swiftly, wands at the ready, and engage in a spectacular magical battle against the dark forces. This would show the Aurors' skills and teamwork.
Dumbledore would be a great addition. Since he has a long history with Grindelwald, his presence could add a lot of depth and backstory to the fanfiction. Another good character could be Hermione. Her intelligence and knowledge of magic could help Harry in his encounters with Grindelwald. Also, Newt Scamander could be included. Given his experience with magical creatures and his own adventures in the wizarding world, he might be able to offer unique perspectives and assistance.
At first, it might be a relationship based on Grindelwald's self - serving motives. He sees Harry as a tool. But as they spend time together, there could be moments of mutual understanding. Harry might start to see Grindelwald not just as a villain but as someone with complex ideas.
Aberforth Dumbledore can be a very important character in these fanfictions. He is Albus Dumbledore's brother and has his own feelings and history related to his brother and Grindelwald. He might be the one who tries to bring his brother back from the brink when Dumbledore is too involved with Grindelwald. Also, Leta Lestrange could be popular. Her family's dark reputation and her own complex relationship with Newt and the wizarding world in general can add an extra layer of drama to the fanfictions involving Dumbledore and Grindelwald.