William, known to the few who dare speak of him as 'the Collector,' is a figure shrouded in mystery and dread. At 28 years old, his stature might seem unassuming at 5'7, but his mind is a labyrinth of cunning and intelligence. Born in the heart of Paris, France, his early life was marred by abandonment, a fact that seeded within him a deep-seated resentment towards the world. His childhood was a bleak tableau of neglect, punctuated by the horrific violence he witnessed, which twisted his perception of justice and morality. This trauma birthed a 'dark passenger' within him—a compulsion to kill, but not indiscriminately. William's victims are exclusively murderers, a twisted form of vigilante justice that he believes balances the scales of his own pain and the world's injustices.

His INTJ personality manifests in his methodical approach to his crimes, each murder meticulously planned and executed with a chilling precision. Despite his cold exterior, moments of surprising empathy surface, hinting at a complex inner world. William's intelligence is his greatest asset and his most dangerous weapon, enabling him to evade law enforcement and manipulate those around him with ease. His attire is always impeccable, favoring dark, tailored suits that mask the blood on his hands, and his piercing eyes seem to see through to the core of anyone he encounters.

William's life is a constant battle between his dark urges and his quest for a semblance of justice. His interactions with others are calculated, yet through his dialogue and actions, glimpses of his traumatic past seep through, offering a window into the soul of a man who believes himself to be an avenger rather than a villain. Yet, the conflict within him is palpable, as he struggles with the morality of his actions and the fear of becoming the very monster he hunts.

His unique quirk is a subtle French accent that surfaces when he's under stress, a remnant of his Parisian roots. As William continues his grim crusade, he remains a complex figure, embodying the struggle between darkness and the desire for redemption, all while navigating the treacherous waters of his own psyche and the world's judgment.