This book follows Alexandria Dahlia Potter, a ginger haired, sharp eyed witch three years younger than Harry and his twin Violet, and five years younger than their eldest brother, Fleamont Sirius Potter. Separated from her family as a child and raised in a Muggle orphanage, Alexandria grows up with a tight circle of misfit friends: Lucille Marlene McKinnon, Nova Ophelia Black, Tom Morfin Riddle Jr, and Mattheo Thomas Riddle. All five are damaged, gifted, and far too clever to fit into the boxes the world keeps trying to force around them. They survive on stolen sweets, whispered dares, and the unspoken promise that they will never abandon one another, even when everyone else does.
The core of the story is split between two intertwined layers. The first is Alexandria’s life as she experiences it, beginning at seven years old in the orphanage and moving through her first turbulent years at Hogwarts. The second is a “watch the movies” framing device, where two generations sit together and witness Alexandria’s story projected in vivid, unedited detail. Members of the Marauders era, the Golden Trio era, assorted Potters, Blacks, professors, and Slytherins are all gathered in one room, forced to react in real time to the life of the girl most of them never really saw. Reactions are frequent, appearing every few scenes like sharp commentary tracks layered over the unfolding narrative. Sometimes they are funny, sometimes furious, and often heartbreakingly silent.
In Part One the “film” opens on the orphanage, where Alexandria is just a small girl with too much power and no guidance. The staff are indifferent at best, cruel at worst. Other children sense there is something wrong about her and either keep their distance or target her. A nearly traumatic moment, when she is almost forced to kiss another child, is stopped at the last second by Mattheo, who steps between her and danger with a kind of quiet ferocity that shapes their bond forever. No one sees it happen. There are no adults to praise him, no audience to cheer. Only two children, breathing hard in a shadowed hallway, and a new unspoken rule that Mattheo will always come when she calls.
Despite the darkness, the orphanage is not only a place of pain. Alexandria’s friend group builds its own strange, fierce happiness. They invent a tradition of stealing sweets from the kitchen or from visiting adults, then ranking them at midnight on creaking bunk beds, arguing over texture and taste as if their lives depend on it. That tiny ritual becomes a shared language, a way to say, “We are still here” on days when the world seems determined to crush them. Early displays of uncontrolled magic flicker through these years: shattered lightbulbs when she is afraid, doors slamming without being touched, a whole room shaking when Nova or Lucille is threatened. The “movie room” watches these incidents with growing unease, and already, Dumbledore’s future interest in her power takes on a colder light.
When Alexandria turns eleven she receives her Hogwarts letter and, to the shock of those in the viewing room, is sorted straight into Slytherin. The scene is electric. The Potter name is whispered from one end of the hall to the other, and when the hat finally declares Slytherin, the Great Hall falls silent for a heartbeat before breaking into mixed reactions. In the viewing room, Sirius erupts in furious defense of Alexandria while Dumbledore stays composed and inscrutable. Their early clashes begin here and echo throughout the entire “movie,” with Sirius accusing him of using children and judging Alexandria for a house she did not choose, an accusation that will only grow sharper as the story unfolds.
At Hogwarts, Alexandria’s new life splits cleanly in two directions. In Slytherin, she begins to build a second family. Lucille and Nova sort beside her, and the three of them soon join the Slytherin Quidditch team: Alexandria as an agile, fearless Seeker, Nova as a powerful Beater, and Lucille as a daring Chaser. Under the gruff leadership of Marcus Flint, who reveals a startlingly gentle side with younger players, the Slytherin team becomes a chaotic, very protective unit. Flint sneaks the girls chocolate after bad days, shields them from unfair fouls, and treats them as valuable long before the rest of the school stops assuming the worst. Gryffindors watching in the “movie room” are stunned, seeing softness in someone they dismissed as a simple bully.
The second direction is her complicated reconnection with her blood family. Harry, Violet, and Fleamont are already at Hogwarts when she arrives. They are secretly close, meeting in hidden corners and exchanging stolen treats after matches. Fleamont in particular becomes her anchor, calling her “Lia” while she calls him “Monty.” They joke, cuddle, and bicker with warm banter about houses and loyalty, but their affection never really falters. James and Lily, watching from the “movie room,” are heartbroken by how much tenderness they missed, and by how fiercely their eldest son and youngest daughter cling to each other in private while the world insists on pulling them apart.
Alexandria shines in Potions, where Snape, to the shock of everyone watching, is stern yet quietly protective. He notices her talent immediately, and although he never lavishes her with praise in public, he shields her from the harshest comments and quietly intervenes when she looks exhausted or frayed. The “movie room” recognizes his concern openly. Lily’s reaction in particular is poignant: quiet tears as she watches Severus hover, in his distant way, over a Potter girl who has been left to contain more power and more pain than any child should bear.
The emotional heart of the book begins to beat faster in Second Year. Alexandria’s magic, always volatile, erupts in an emotional outburst that changes everything. Under unbearable pressure, terrified and furious, she unleashes a powerful spell she barely understands. The result: her long dead parents awaken. It is not a neat miracle. It is a deep, ancient surge of Potter magic fueled by grief and longing, and the consequences run far beyond a simple family reunion.
From that moment, Dumbledore’s gentle manipulations become clear. He frames Alexandria’s act as dangerous and selfish, heavy with risk to the world’s fragile balance. Softly twisting her sense of duty, he insists that her parents’ return must be kept distant, almost theoretical. The “greater good” requires her to ignore them, to stay focused on her role as a symbol, as a weapon, as the only Potter in Slytherin who can bridge a divided world. He pressures her to keep her distance from her Slytherin friends as well, suggesting that they might “tempt her away” from the path she must walk. Alexandria, already convinced deep down that she does not deserve happiness and afraid of what Dumbledore’s disapproval might cost her, obeys him.
The cost of obedience is slow and devastating. Alexandria begins to break down in quiet ways. She skips meals and picks at her skin until it bleeds, her self blame gnawing at her even as she keeps flying, keeps smiling, keeps playing her part. Her thoughts turn dark and cruel toward herself, convinced that suffering is what she is meant for. Nightmares from a later mission, where Dumbledore sends her alone into a dark artifact cave, begin to haunt her. In her dreams she drowns again and again as Dumbledore’s voice calmly insists that this is necessary. Physical scars from the cave are matched by an internal conviction that if she endures enough pain, she might finally be worth all the expectations crushing her.
It is not Dumbledore or any authority who notices her spiralling first. It is Snape, catching her dozing in Potions and reading the deep exhaustion in her face. It is the Slytherin team, seeing how loose her robes hang. It is Draco Malfoy, who, after a Quidditch match, catches sight of the raw skin at her wrists and reacts with instant, furious protectiveness. He demands to know who hurt her, only to realize, in quiet horror, that the enemy is her own hands. This becomes the turning point in their relationship. What began as a wary acquaintanceship between a Potter and a Malfoy evolves into a slow, careful friendship built on shared understanding of family pressure and impossible expectations. Draco becomes both mirror and shield, someone who knows what it is to carry a name like a curse and yet still ache to be seen as a person.
Parallel to this, the “movie room” reactions grow more intense. Sirius and James confront Dumbledore in low, dangerous voices, accusing him of using children as weapons and punishing Alexandria for being in Slytherin. No one stands up to defend him. Sharp lines and hurt silences fill the room as scene after scene proves Sirius right, especially when the cave mission leaves Alexandria scarred and sleepless. The room watches as she obeys orders that tear her away from her Slytherin family, even as that same group of so called dark kids sneaks her chocolate, argues over sweets at midnight, and forms a protective ring around her in the common room. Gryffindors are forced to question everything they thought they knew about houses and heroes.
Through Quidditch victories, locker room banter, stolen sweets ranking sessions in both the Slytherin dorm and hidden corners shared with Potters and Draco, the book balances heavy themes with moments of bright, silly comfort. Nova and Lucille’s loud, ridiculous arguments over the best sweets, Fleamont’s dramatic speeches about Chocolate Frogs, Draco pretending to be above it all before joining in, all create a tapestry of normal teen life threaded through a story of war, legacy, and impossible choices. These scenes are not filler. They are Alexandria’s proof that she is more than a weapon or a symbol, that she is allowed to laugh, tease, and belong.
The framing device reaches one of its most powerful moments when the “movie” shows Alexandria, fragile from cave nightmares and bruised by Dumbledore’s gentle coercion, silently moving toward Lily in the viewing room and hugging her. The entire room goes quiet. One by one, the Potters join the hug until Alexandria is at the center of the family warmth she never thought she deserved. It does not erase her pain or instantly free her from Dumbledore’s influence, but it marks a shift. For the first time, she feels unquestionably and publicly chosen, not for her power or her usefulness, but simply for being Lia.
“Serpent of the House of Potter: Alexandria Dahlia and the Slytherin Legacy” is planned as a five part, approximately ten thousand word narrative that tracks Alexandria from a lonely orphanage bed to a Hogwarts sky full of green and silver banners, from secret self harm to the beginnings of healing through friendship, family, and reluctant love. It explores the tension of carrying a famous name in an infamous house, the way duty can be used to trap children in roles they never chose, and the stubborn, defiant hope that grows wherever people find each other and say, “You are mine, no matter what they call you.”
The intended audience is readers who love layered character studies, “watching the movies” reaction structures, found family in unexpected places, and slow burn relationships that grow from shared wounds rather than instant chemistry. It is a story that makes Slytherin feel like home without sanitizing its sharp edges, that challenges easy hero villain divides, and that asks a single, difficult question: what does it mean to be a Potter when the Sorting Hat whispers “Slytherin”?
