Harry immediately decided that he hated that moniker. He also didn't want the people to stare at him like he was some exotic animal in a zoo. He hated being in the center of everyone's attention. And once he made that known, professor Flitwick agreed to help him a little: with a quick flick of his wand the diminutive wizard placed a glamour charm on the young Potter, making his appearance change subtly yet enough to make him much harder to recognize.
Harry was still staring in wonder at his reflection in the window, when the 'Knight Bus' finally made a stop at Charing Cross Road and professor Flitwick ushered him outside. Once there, the older wizard pointed at a tiny, grubby-looking pub.
"This is the 'Leaky Cauldron', Mr. Potter." The Hogwarts' Charms Master lectured as they entered the establishment. "This pub has been the gateway between the muggle and magical worlds since the beginning of fifteenth century. It's also a nice place to have a good meal, and you can rent a room in there." The green-eyed boy made a note of that: one day he might need a reprieve from the Dursleys, and this pub looked like a great sanctuary. Deep in his thoughts, Harry only noticed that they've reached a small walled courtyard, with nothing but a trash can and a few weeds in it. "This is where an entrance into the Diagon Alley is located, Mr. Potter." professor Flitwick said. "Once you have your wand, you will simply need to tap this brick with it three times, and..." He did that, and suddenly the bricks of the wall rearranged themselves into a wide arch.
"Whoa!" The young Potter breathed out in amazement as he took in the sight of a cobbled street where seemingly every house was a colorful magical shop. Entire crowds of wizards and witches of all ages were moving between the stores, looking for the best deal on whatever goods they needed.
"Welcome to the Diagon Alley, Mr. Potter." The Hogwarts' Charms Master drew Harry's attention back to himself. "We will be visiting a few of this shops later on, but our first stop is the Gringotts back." He said, while pointing at a white-marble building that towered over the other little shops. "Gringotts is run by goblins and is reputed to be one of the most secure places in Great Britain if not entire Europe." Still overwhelmed by the new experiences, Harry simply allowed the diminutive professor to lead him into the bank while trying to take in as much of the Diagon Alley as his two eyes would let him to.
Once inside the Gringotts back, professor Flitwick approached the nearest unoccupied goblin teller and exchanged several phrases with him, in a rough language that Harry couldn't understand. Eventually, the two finished speaking, and the teller turned his attention to the green-eyed wizard.
"Mr. Potter, in order to prevent thievery, we need to confirm your identity. Once it has been verified that you are indeed who you claim to be, all existing keys to your trust vault will be invalidated, and a new one will be forged." Harry nodded, somewhat absentmindedly, as he was still overwhelmed by what he was seeing around himself. "Do write your full name with the quill provided." The goblin said, while giving him a piece of parchment with the bank's seal, and a strange reddish-black quill.
"This is a blood quill, Mr. Potter." Professor Flitwick said. "It writes in a person's very blood and is generally used for signing legal documents. This particular quill is enchanted to greatly reduce the effects it has on the writer. Even with those enchantments in place, however, writing with this quill will be rather uncomfortable, so I recommend you brace yourself." Nodding, Harry took the offered quill and started writing his name on a parchment, wincing from an unpleasant sensation of something invisible trying to scratch something onto the back on his hand. But he needed to do this to access his money, so he braved the discomfort...
Once he was done, the goblin teller collected both the piece of parchment and the quill and began examining Harry's signature. Apparently satisfied with what he could see, the goblin then used his magic to destroy the parchment. Then, he pressed one of the many runes inscribed on his counter and barked some orders in the goblin language.
"It appears that you are indeed Mr. Potter." The teller said, once again speaking in plain English. "The creation of a new key to your trust vault has been authorized. The key should be forged and delivered to you within thirty minutes." The young wizard nodded, while trying his best to sooth his poor hand. "Do you have any other business with Gringotts today?"
"Um..." Harry began awkwardly. "You said that you will create a new key to my trust vault. Does that mean that I – well,.. house Potter – has other vaults?" He asked then.
"House Potter currently has three vaults within our bank." The teller replied. "If you wish to learn more about those, I suggest you speak to your account manager. Anything else?" This time, it was professor Flitwick, who spoke up.
"Who is the current account manager in charge of Potter assets, and is he or she available at this moment?" He asked, this time speaking in English instead of the goblin language, presumably for Harry's benefit. The teller was silent for a few moments as he, apparently, checked whether the Potters' account manager was available right now.
"Account manager Silverclaw is available and agrees to see you now." The teller said finally. "Assistant Griphook will escort you there." One of the smaller goblins appeared seemingly out of nowhere next to the teller's counter.
"Please follow me, Mr. Potter." He said, making Harry look at the Hogwarts' Charms Master.
"I'm sorry, Mr. Potter, but I'm not allowed to accompany you." Professor Flitwick said. After a moment of silence, he continued with an advice: "If you are going to sign any documents, make sure that you completely understand what exactly is written in them. As you are the last of your bloodline, even if you aren't of age yet, the decision you make can and will affect your family's finances."