Marcus Chen died on a Tuesday.
It was embarrassingly mundane, all things considered. No heroic sacrifice, no final words of wisdom, no slow-motion montage of his life flashing before his eyes. Just black ice on the M25, a lorry driver's momentary distraction, and the crushing realization that his Audi A6 made for a terrible defensive barrier against twenty tons of refrigerated goods.
He'd been thinking about galleons when it happened.
Not the investment kind. The wizarding kind. His sister Lily—twelve years old and obsessed with "this children's book series you'll love, Marcus, I swear"—had left her copy of Harry Potter and the Philosopher's Stone in his passenger seat. He'd been idly flipping through it at a red light, chuckling at the Weasley family introduction, wondering how a family could be simultaneously so loving and so broke.
"Five galleons," he'd thought, right before the world went sideways. "I'd pay five thousand galleons to see their faces when they realize the weasel was playing them all along."
Then: impact. Darkness. And a voice like grinding stones speaking words he couldn't understand.

He woke up screaming.
This was, he would later reflect, a reasonable reaction to discovering oneself naked, slimy, and approximately eighteen inches long. The screaming came out as more of a furious wail, which was also reasonable given that his vocal cords were brand new and apparently calibrated for "hungry infant" rather than "terrified adult investment banker."
"Oh, Merlin's saggy left—another one!" a woman's voice exclaimed. "Arthur, he's got lungs like Charlie!"
"Red hair," a man's voice said, thick with emotion. "Look at that, Molly. Another redhead. That's five for five. We're going to have to start a quidditch team at this rate."
Marcus tried to open his eyes. They didn't work properly. Everything was blurry shapes and overwhelming scents—something warm and bready, something sharp and herbal, something that made his stomach clench with desperate hunger.
This is a hospital, he thought, because his brain was still trying to be logical about things. I've survived. Head trauma. Hallucinations. The lorry must have hit the passenger side, Lily's book, I was reading about—
"Welcome to the world, little Ron," the woman—Molly—whispered, and suddenly he was pressed against something warm and impossibly comforting. "Ronald Bilius Weasley. My beautiful boy."
Ron.
Weasley.
Marcus Chen's last coherent thought before infant exhaustion claimed him was: Oh. Oh no. Oh, this is either the afterlife or I've won the lottery, and I don't know which is more terrifying.

He learned it was the lottery.
It took three years to be certain. Three years of pretending to be a normal magical toddler while his adult mind screamed behind his eyes, cataloging everything, calculating probabilities, fighting the urge to speak in complete sentences when he could barely walk. Three years of watching Molly Weasley's wandless household magic and realizing that this woman could duel Death Eaters to a standstill. Three years of observing Arthur Weasley's "fascination with Muggles" and recognizing it for what it was: the most sophisticated intelligence network in magical Britain, hidden in plain sight.
Three years before the System activated.

He was three years old, sitting in the Burrow's kitchen while Molly attempted to convince two-year-old Ginny that mashed peas were not, in fact, a tool of Dark wizard oppression. The twins—Fred and George, already showing signs of terrifying genius—were experimenting with what they called "the toast launcher" in the corner. Percy was reading a book about prefect procedures. Bill and Charlie were at Hogwarts.
Marcus-Ron was thinking about compound interest rates.
If I could just access the family vaults, he mused, because he'd been doing that a lot lately, the Prewett connection alone should be worth—
[CONDITIONS MET]
[THE WEASEL'S CUNNING ACTIVATING...]
He dropped his spoon. It clattered against the stone floor, but no one noticed because the world had gone gold.
Floating before his eyes—visible only to him, he somehow knew—was text. Glowing, serif-font text that looked like it belonged on a stock exchange ticker crossed with an ancient grimoire.
WELCOME, HEIR OF THE WISE SOULS
YOU HAVE BEEN SELECTED TO RESTORE THE GLORY OF HOUSE WEASEL
CURRENT STATUS: CONCEALED
CURRENT WEALTH: 73 GALLEONS, 14 SICKLES, 3 KNUTS (LIQUID)
HIDDEN ASSETS: 847,293 GALLEONS (FROZEN)
FAMILY POWER RANKING: 28TH OF 28 (PUBLIC) / 3RD OF 28 (TRUE)
Marcus-Ron stared. Then, because he was three and allowed to be dramatic, he stared harder.
What.
QUEST AVAILABLE: THE BURROW'S SECRET
DESCRIPTION: Your ancestral home contains twelve hidden compartments. Find one.
REWARD: 50 CUNNING COINS, MAP FRAGMENT
ACCEPT? [Y/N]
Marcus-Ron looked at Molly, who was now engaged in full-scale pea warfare with Ginny. He looked at the twins, who had successfully launched toast into the ceiling beams. He looked down at his chubby three-year-old hands.
Then he thought: I've spent three years being careful. Three years hiding. Three years pretending I don't know that Fred dies in a war, that Sirius falls through a veil, that my future best friend grows up in a cupboard under the stairs.
Screw careful.
He focused on the golden text and thought, with all the force of a man who'd once negotiated a hostile takeover of a Singapore tech firm: Yes.

The first compartment was behind the flour tin in the pantry. It contained a journal written in a language that made his eyes water, a bag of coins that the System identified as "Pre-Statute Galleons (Collector's Value: 500x)", and a letter addressed to "The Awakened Weasel."
Marcus-Ron—no, Ron, he was Ron now, he'd accepted that—sat in the pantry with ancient gold in his lap and read words that changed everything.
"If you are reading this, the blood has awakened. The world believes us poor, scattered, defeated. Let them believe it. For sixteen centuries, House Weasel has survived by being underestimated. We are the advisors behind the thrones. The spies in the shadows. The ones who choose when wars begin and end.
We are not blood traitors. We are the blood that matters.
The name 'Weasley' is a mask. 'Weasel' in the old tongue is 'Wise Soul.' Remember this when they mock you. Remember this when they pity you. Remember this when you strike.
The war is coming. The Dark Lord rises. And you, my descendant, have been given a gift beyond price: foreknowledge. Use it wisely. Use it cunningly. Use it like a weasel.
Build the hoard. Gather the pack. Protect the innocent. And when the time comes, show them why the weasel sits at the top of the food chain.
—Merrick the Cunning, 982 A.D."
Ron sat in the flour dust and laughed. It came out as a toddler's giggle, which was perfect. Absolutely perfect.
They think we're poor, he thought. They think we're stupid. They think we're light side fanatics who chose morality over power.
They have no idea.
He checked his System interface. New text had appeared.
HIDDEN QUEST UNLOCKED: THE PURITY OF PURPOSE
DESCRIPTION: Restore House Weasel to its true position while maintaining the 'Blood Traitor' cover. Prevent all major canon tragedies. Build an empire of light.
TIME LIMIT: 17 YEARS (UNTIL VOLDEMORT'S DEFEAT)
REWARD: ???
FAILURE PENALTY: CANON TIMELINE
Ron thought of Harry Potter, right now sitting in a cupboard under the stairs. He thought of Hermione Granger, probably reading books twice her age in a dentist's waiting room. He thought of Sirius Black in Azkaban, innocent and screaming. He thought of Cedric Diggory, who didn't know he had less than fourteen years to live. He thought of Fred Weasley, who would die laughing at a joke.
No, Ron decided. Not this time. Not on my watch.
He closed the journal. He hid the pre-Statute galleons in his enchanted baby bag (thank you, System inventory). He walked back into the kitchen on unsteady three-year-old legs and smiled at his mother with all the charm of a Weasley and all the calculation of a reincarnated banker.
"Mummy," he said, in the baby voice he'd perfected, "can we have Harry over for tea? I had a dream. He's lonely."
Molly Weasley looked at her youngest son with the kind of perception that had kept five boys and a girl alive in a wizarding war. For a moment, just a moment, her eyes narrowed.
Then she smiled. "Of course, darling. Anyone special you want to be friends with is welcome here. That's what Weasleys do. We make friends."
Yes, Ron thought. We do. And then we make them family. And then we change the world.
The System chimed.
[FIRST ALLIANCE QUEST INITIATED: THE BOY WHO LIVED]
[CUNNING COINS EARNED: 10]
[THE GAME BEGINS...]

Seven years later, on a train platform in London, a red-haired boy with a secret fortune and a System interface would meet a black-haired boy with glasses taped together and a lightning scar. He would offer him friendship, not out of pity, but out of strategy. He would change everything—not by being the Chosen One, but by being the one who chose to help the Chosen One.
He would be called many things. Sidekick. Second best. The funny one. The one who leaves.
They would be wrong.
He was the weasel.
And the weasel always wins.