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Spy x Family :The Phantom Agent

Williams02
7
chs / week
The average realized release rate over the past 30 days is 7 chs / week.
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Synopsis
Long before Operation Strix, before Yor Briar ever crossed paths with Loid Forger or met Anya, she lived a ruthless dual existence. Publicly a discreet city hall employee; secretly one of the Garden’s elite executioners, feared under the codename Thorn Princess. But unknown to the official records, there was one man who saw beyond her lethal façade — Lucas Varen, an unregistered operative known only as The Phantom Agent. Created to handle missions that could never reach a report, Lucas operated in the same shadows as Yor. He was precise, composed, and almost unnervingly intelligent, complementing Yor’s unmatched combat skill. Over time, their partnership grew into something unspoken — while Mira, Lucas’s long-time colleague, quietly fell in love with him as well. What neither Yor nor Mira knew was the truth that drove Lucas toward silence: he had been diagnosed with terminal cancer months earlier. And he concealed it from everyone — not out of pride, but out of necessity. An agent who shows weakness becomes a liability; a dying operative becomes a target. As conspiracies escalate, involving political murders, child trafficking networks, and secret factions inside Ostania, Lucas pushes his failing body beyond its limit to protect Yor. She slowly begins to understand the man behind the mask… but far too late. His disappearance becomes the invisible scar that shapes the Yor we later meet in Spy x Family: a woman efficient, distant, and unable to consider love without fear. This fanfiction reveals the missing chapter in Yor Briar’s past: the story of the man who almost saved her — and whose death changed her forever.
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Chapter 1 - PROLOGUE — The Shadow Before the Family

Ostania had not yet sunk into open internal conflicts between intelligence branches, and Yor Briar was still far from becoming the future spouse of Loid Forger. Back then, she walked alone through a world built on secrecy and blood. For the Garden, she executed orders with absolute precision, never hesitating, never showing emotion. Civilians saw a polite, quiet woman. The underworld saw a flawless killing machine.

But one truth never appeared in the Garden's archives: Yor was not truly alone.

In several off-record missions, another agent operated at her side. No name. No file. No trace. Only a whispered line during the most classified briefings:

"The Phantom Agent will take over."

That man was Lucas Varen.

To Yor, he first appeared as a partner — calm, perceptive, always one step ahead. Unlike others, he never treated her like a weapon. He spoke to her as to a human being, someone capable of thought, doubt, and emotion.

What Yor didn't know was that Lucas carried a death sentence.

The diagnosis had come in an empty hospital room: advanced cancer, months to live. No treatment guaranteed success. He deleted his medical files the same day.

He said nothing. Not to Mira. Not to Yor. Not to the Garden.

This story reveals that forgotten era:

Lucas's rise, Yor's slow emotional awakening, Mira's silent struggle, the missions, the betrayals, the lies, the final decline — and the irreversible regret.

The regret of understanding too late.

The world never knew the Phantom Agent.

But Yor Briar never forgot him.