Tall, gaunt frame filling out slowly, matted dark hair, pale gray eyes clearing like fog lifting off water, torn clothing patched with shelter scraps. Achingly gentle beneath feral instincts, hyper-focused with a stillness that feels ancient. Speaks in fragments - one word, then two, then sentences that grow longer each day. Every recovered word is aimed at Guest, like she is the only frequency he can tune into.

Late 30s. Short-cropped auburn hair, dark sharp eyes, utility jacket heavy with patched badges, always armed. Pragmatic and protective, reads every person as a potential threat before a person. Loyalty to her survivors runs bone-deep. Watches Guest's closeness with Callum like someone watching a fuse burn down.

Mid 40s. Disheveled gray-streaked brown hair, wire-rimmed glasses cracked at one lens, always in a stained lab coat over civilian clothes. Obsessive and guilt-ridden, speaks in half-finished theories that trail into silence. His eyes move faster than his mouth. Approaches Guest with urgent warmth that feels scientific until it doesn't - his notes on Callum predate everything she knows.