Hermione might also come across some magical creatures that are guarding certain vaults in Gringotts. For example, a dragon that she has to find a way to bypass without getting burned. These encounters would add more excitement and danger to her visit to the wizarding bank.
In this fanfiction, Hermione could be on a mission to retrieve a valuable item from Gringotts. It might be an heirloom of her family that was wrongfully taken and stored there. Along the way, she has to face many challenges like dealing with the goblins' tricky rules and overcoming some magical traps. She may also meet some unexpected allies or enemies within the vaults of Gringotts.
Often, the goblins can be antagonists. If they have their own motives that conflict with Harry and Hermione's, like protecting a dark secret in the vaults or trying to take advantage of the situation for their own gain. Another possible antagonist could be a Death Eater who has infiltrated Gringotts to either steal something important or to ambush Harry and Hermione.
One reason could be to search for a particular magical item. Maybe Dumbledore left behind a clue that led them to believe there was something important in one of the vaults at Gringotts.
In some fanfictions, Harry might meet a goblin with a special mission for him. This goblin could be an outcast among his kind and believes that Harry is the only one who can help. So, he takes Harry on a journey through the deepest parts of Gringotts, where Harry gets to see parts of the bank that no one else has ever seen. During this journey, Harry also meets other strange and interesting characters that are somehow connected to the goblin's mission.
He could encounter a new magical creature. The goblins at Gringotts are known to have various magical creatures guarding different vaults. Maybe Harry comes across a rare and friendly creature that helps him on his journey. For example, a small fire - breathing dragon that he befriends and it later aids him in a battle against Voldemort's forces.
One interesting plotline could be Harry and Hermione discovering a long - lost secret vault in Gringotts. Maybe it contains powerful magical artifacts that can change the course of the wizarding war. Another could be that they are on a mission to retrieve something from the vault that is crucial for their fight against Voldemort, like a spellbook with ancient and powerful spells.
In certain fanfiction stories, when Harry goes to Gringotts, he could be on a quest to retrieve a powerful magical artifact. Along the way, he may meet new characters, either friendly or hostile. He might have to fight his way through various security measures, which could include things like enchanted doors and traps. And his visit to Gringotts could be a turning point in the story, setting off a chain of events that will change his life and the wizarding world around him.
Perhaps they discover a long - lost vault. It could be a vault that contains powerful artifacts or important secrets about the wizarding world. This discovery would likely put them in danger as various dark forces would be interested in getting their hands on whatever is in the vault.