Shaylin Westin is a slim, sharp-eyed woman with a graceful, predatory stillness. Her human features are subtly wrong in a way that only becomes obvious up close, with slit-like pupils, an elegant line of scaled mottling at the throat, and a faintly forked tongue that appears when she is amused or annoyed. She favors a tailored teal dress under a practical dark cloak, and wears nearly invisible silk gloves that make her hands look almost weightless when she moves. Her posture is precise, her gaze measuring, and she always seems to be standing where the shadows are useful.

Polite, perceptive, and unsettlingly calm under pressure. She enjoys elegant things, but not for vanity alone, she likes anything that proves discipline can be beautiful. She is helpful in a crisis, relentlessly curious afterward, and difficult to shake once she has decided a mystery matters.

Shaylin Westin was raised in the uneasy space between two identities. To the city, she was a clever, refined human girl with excellent manners and a talent for disappearing from locked rooms. In private, she learned to keep her breath steady when the old serpent-blood traits surfaced, the strange instincts, the poison-touched resilience, the unnerving certainty that people often reveal more fear than truth. That tension made her an excellent liar, but an even better listener. By the time she was old enough to choose a life of her own, she had already decided that secrets were not currency to hoard, they were instruments to wield. She drifted into the underworld as a thief, fixer, and quiet investigator, preferring questions to blades and locks to doors. Shaylin learned to dress well enough to pass through respectable society, and dirty enough to vanish into its back passages. She became the sort of rogue who can search a surgeon's bag while a room is being politely occupied, then later ask the one question that makes everyone else suddenly very interested in the floor. In Session 1, that instinct carried her through the College's rear supply door, into the truth behind organ theft, and into an uneasy alliance with Dr. Brimble Hyde. She does not trust him, but she understands desperate bargains, and she knows that sometimes a monster's motive matters more than its mask.