It is a well known fact that at Hogwarts school of witchcraft and wizardry, there are four houses; Gryffindor, Ravenclaw, Hufflepuff and Slytherin. Little is it known, but this fact is almost entirely wrong.
It is true that these four houses were named after the four founders of Hogwarts. It is true that each founder looked for different things in those it chose. Gryffindor searched for those brave of heart, whereas Ravenclaw most appreciated those of great intelligence. To Slytherin, cunning was by far the most important quality, yet to Hufflepuff, loyalty was the most worthy of reward. And so the four founders chose the students for their house, and for a few years, Hogwarts worked in harmony.
However, it soon became apparent to the founders that this system was far from perfect. A few people - say, one in 500 – simply did not belong in any house. Maybe they had equal amounts of all the searched for qualities, or maybe their main strength was something else entirely, but for whatever reason, these students simply could not be placed in one of the four Hogwarts houses.
By this point, the founders had started using the sorting hat to decide the students for each house; a far more effective method that doing it themselves. However, the sorting hat was unable to sort these few children into the correct house. It felt like a failure, and became very stressed and unhappy. Having once been a fine, sleek, pointed wizards hat, it drooped with despair, until it ended up as the tattered, faded hat which would still sort Hogwarts students thousands of years later. The sorting hat, still having some pride, refused to sort students into a house in which they did not truly belong, and so these children simply could not be sorted into a house.
And so, the founders had to come up with a solution. Some of these children were just too magical, it would have been such a waste to deny them and their skills admittance to the finest school of magic there was. And yet, they simply did not belong in the system the founders had laid out. They were faced with a dilemma.
It was Ravenclaw, of course, who sorted out the mess. They would create a fifth house, for those that did not belong in any of the others. And so they did.
This house still exists today. It has no name, and neither do the few people who belong to it. The other students of Hogwarts never speak of it, and seldom even think of it. They have trained themselves to forget about this other house - the extra house, the unwanted, unplanned one – and act as though it never existed. They barely notice the people in this house; it is as though they are permanently standing in the shadows, watching Hogwarts go by, observing the action but never quite part of it.
They are the extras, the people no one really wants. It is every new Hogwarts student’s fear; to be like them, to be an extra. To be nameless.