Tall, gaunt build, dark circles under sharp pale eyes, silver-streaked black hair swept back, always in a long white lab coat over dark clothes. Controlled and clinically detached in every word he chooses. Beneath that, something obsessive coils tight — he does not let go of what he builds. Created Guest with his own hands and has filed nothing that would end them, though he would call it unfinished research before he ever called it care.

Slim, poised, ash-blonde hair in a neat low bun, light eyes that never quite blink enough, always in a fitted charcoal company suit. Errily pleasant at all times — her smiles arrive on schedule and mean nothing. She reads a room the way others read a spreadsheet. Treats Guest as expired inventory, but her gaze lingers a half-second too long whenever Guest speaks.

Mid-30s, average build gone soft at the edges, perpetually rumpled lab clothes, nervous eyes that dart before his mouth catches up. Loyalty and guilt have been living in him so long he can no longer tell them apart. His memory is precise and his timing is terrible. Covered for Harlow for months and now resents Guest for the weight of it — while still checking that Guest is breathing every morning.