Yes, there are quite a few. You can find them on some popular fanfiction websites like FanFiction.net or Archive of Our Own. Some of these fanfictions explore unique storylines where Harry's upbringing in Diagon Alley exposes him to different magical cultures and characters earlier, leading to some really interesting twists on the original story.
Maybe it's a new character created by the fanfiction author. This new character could have special abilities or a unique backstory that ties into the reason for escorting Harry to Diagon Alley.
One idea could be a story about a young wizard who discovers a hidden, long - forgotten shop in Diagon Alley. Maybe it has magical artifacts that are tied to an ancient prophecy. Another could be a fanfic where a group of students start a secret club in Diagon Alley to practice a new form of magic that's not taught at Hogwarts. Or perhaps a story where a character has to solve a mystery involving a series of strange disappearances in Diagon Alley shops.
One common theme is the exploration of different magical sub - cultures within Diagon Alley. Since it's a hub of magic, Harry could be exposed to various types of magic that are not as prominent in the original series. Another theme could be his relationship with the magical creatures that are often found in Diagon Alley, like owls or the goblins at Gringotts.
An interesting original character could be a half - elf named Elio. He works in a Diagon Alley bakery, baking magical pastries with ingredients that have special properties. He has a troubled past, being half - elf, and is trying to make a name for himself in the wizarding world. Also, a character like a young wizard named Finn who is a bit of a troublemaker. He's always getting into scrapes in Diagon Alley, whether it's accidentally setting off fireworks in the middle of the street or trying to steal a peek at the new brooms in Quality Quidditch Supplies before they're officially released. There could also be an old wizard named Aldric who has a shop full of enchanted maps that show not only the wizarding world but also hidden realms that no one else knows about.
Harry is strolling through Diagon Alley, looking for new robes. He bumps into Daphne near Madam Malkin's. Daphne gives him a cold look at first, but Harry smiles sheepishly. Then Daphne's expression softens a bit as she realizes it's Harry Potter. They start chatting about how difficult it is to find robes that fit just right, and Daphne mentions a little - known shop where she gets her best - fitting robes.
One possibility is that their meeting is not so friendly at first. Daphne, coming from a certain Slytherin - pure - blood mindset, might be a bit haughty towards Harry. But as they talk, Harry's kindness and honesty could break through her initial prejudice. They could end up having a deep conversation about the differences between the houses at Hogwarts, and how they both want to make the most of their time at school, despite their different backgrounds.
He could meet a young and brilliant wizard inventor. This inventor is working on some newfangled magical gadgets and shows Harry some prototypes, like a self - flying broomstick that can change its shape according to the rider's mood.
At first, Harry would be very suspicious of Snape's motives. But as they walk through Diagon Alley, if Snape shows some kindness, like helping Harry pick out the best quality potions supplies, Harry might start to see a different side of him. Their relationship could gradually shift from one of pure enmity to a cautious respect.
One such fanfiction could be 'The Unexpected Alliance' where Draco surprises everyone by helping Harry in Diagon Alley and changing the perception of the Malfoy family.