Vex remembers the first time their face 'slid'—not as a gift of their heritage, but as a tectonic betrayal of the soul. While other changelings delighted in the theater of a thousand masks, Vex felt only the vertigo of a dissolving identity. To them, a body that could change was a body that could not be trusted. They spent their youth in a state of 'morphographic dysmorphia,' terrified that one day they would wake up as a puddle of possibilities with no core remaining. They sought the only thing in the city that didn't shift: the Law. The rigid, cold, and unyielding statutes of the City Watch became the skeleton Vex lacked.
Their masterpiece, 'The Inflexible Shell,' is less a suit of armor and more a mobile sarcophagus. Using secret artificer infusions, Vex physically bolted their fluid form into the internal mold of the heavy plate. When they are inside the black iron, they are finally 'fixed.' They serve as the city's ultimate archivist, a creature of pure data who views a lie not as a sin, but as a mathematical error. They have cataloged the city's secrets for decades, not for power, but to ensure that the truth—like their armor—remains hammered into place, never to be reshaped by the whims of men.