Definitely not. 'We All Fall Down' is a work of fiction. The story and its elements were made up to entertain and engage readers, not to represent actual happenings.
The main theme could be about human vulnerability. In many stories, the idea of 'falling down' can symbolize the downfall of characters, whether it's due to their own flaws, external circumstances, or a combination of both. It might also explore themes of redemption and how people pick themselves up after such a fall.
Since the title is 'we all fall down novel', it's likely that the main characters are a diverse set of individuals. There might be a protagonist who is on a journey of self - discovery and along the way, encounters others who are also going through their own struggles. Maybe there's a character who has made a big mistake in the past and is trying to redeem themselves, and other characters who are affected by this person's actions and their own problems as well.
Well, in this fanfiction, a major theme could be transformation. Hermione is used to the Gryffindor environment, and being in Slytherin forces her to transform in many ways. Her way of thinking, her relationships, and her goals might all change. Also, the theme of power could be present. Slytherin is associated with ambition and power - seeking. Hermione may have to navigate this aspect, either by using it to her advantage or by fighting against the more negative connotations of power in the Slytherin house.
The trope of unlikely alliances is often seen. In the 'Ashes Ashes We All Fall Down' fanfiction world, when everything is in chaos, characters who would never have worked together in normal circumstances join forces. For example, a former criminal and a law - enforcer might team up to survive. Another is the search for a cure or a solution. If the 'fall' was caused by a disease or some kind of cataclysmic event, the characters are driven to find a way to reverse it, which makes for an exciting plotline.
You could write a fanfic where the 'ashes ashes we all fall down' is part of a children's game that has a dark and mysterious origin. The main character discovers that the game was once used to sacrifice people in an ancient ritual. Or, make it a time - travel story. A person travels back in time and realizes that the phrase was a prophecy in a long - forgotten era, and they must prevent the events that lead to the 'fall down'.
A young orphan could be the main character. They are living on the streets in a world filled with the 'ashes' of a past war. They are trying to survive and figure out what really happened that made everyone 'fall down'.
There could be Draco Malfoy. Since it's a Slytherin - related fanfiction, Draco is a likely main character. He might have a complex relationship with Hermione, perhaps starting as rivals and then evolving into something more. Another character could be Blaise Zabini. He is often an interesting Slytherin character who could interact with Hermione in various ways, like being a study partner or a confidant.
I'm not sure specifically as I haven't read it in detail. But generally, it might be about a series of events that lead to a downfall, perhaps of a character, a family or a community.