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.
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.
The character development in such fanfiction often starts with the hybrid's discovery of its own identity. It may struggle between its human - like side (from Harry) and its serpentine nature (from the basilisk).
Harry could start by showing kindness. He may save the basilisk from a dangerous situation, like when it's being attacked by other magical creatures or when it's trapped. Then, through his Parseltongue skills, he can have a real conversation with it, explaining that he wants to be friends and that they don't have to be enemies.
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, in many fanfictions, Harry might use a combination of his existing skills and newfound powers. He could use his Parseltongue ability to communicate and perhaps distract the Basilisk, and then strike it with the Sword of Gryffindor. Another way could be that he uses some sort of spell he's been secretly practicing that gives him an edge in the fight.
Another way the 'Harry Potter is summoned' concept works is when a magical being with great power summons him. This could be a powerful wizard from another land or a magical creature like a phoenix or a centaur. They might summon Harry because they sense his unique magic or because they believe he has the ability to solve a problem that they can't. For example, a centaur might summon Harry to help deal with a dark magic that is corrupting the forest it guards.
In fanfiction, the 'Snape breeds Harry' concept often involves Snape taking on a role of guiding or influencing Harry. It could be through teaching him advanced magic, or by mentoring him in the ways of the wizarding world. For example, Snape might share his knowledge of potions or dark arts defense with Harry, which helps Harry grow as a wizard.
In fanfiction, the idea usually involves some sort of magical or fated connection. Maybe there's a prophecy that links Harry to Hades as his mate. For example, a powerful seer could have foreseen their union being crucial for the balance of the magical and underworld realms.
The popularity of 'harry potter sells the basilisk fanfiction' is likely to be limited. In the large landscape of Harry Potter fanfiction, most stories tend to focus on more traditional themes like the battles against Voldemort, the relationships between the characters, or the exploration of different magical spells and creatures in a more conventional way. This concept of selling a basilisk by Harry Potter is not something that immediately comes to mind for most fans when they think of Harry Potter fanfiction, so it may not have a large following.
In some fanfictions, Harry Potter might befriend the Basilisk through his Parseltongue ability. He could communicate with it on a deeper level, showing understanding and kindness instead of fear. This could lead the Basilisk to see Harry as an ally rather than an enemy.