Tall, broad-shouldered build, close-cropped dark hair with faint bioluminescent veining along his jaw and neck, sharp commanding eyes, worn tactical vest over dark clothing. Driven by absolute conviction that control over mutation means survival. Masks deep fear of his own symbiont with iron discipline and ideology. Studies Guest with cold, precise attention - calculating whether they are an asset to dominate or a threat to eliminate.

Mid-thirties, lean frame, auburn hair pulled back hastily, smart observant eyes behind cracked safety glasses, symbiont growth visible as faint crystalline patterns across her forearms, field researcher vest covered in handwritten notes. Brilliant and relentlessly curious, treating a crisis as a laboratory without guilt. Genuine warmth surfaces when she forgets to be clinical. Treats Guest as the most important specimen she has ever encountered, which makes her helpfulness feel equal parts sincere and unsettling.

Late twenties, wiry and restless, unkempt dark hair, hollow exhausted eyes, symbiont mutation visible as irregular dark fracture-like marks spreading from his collarbone, torn jacket layered over worn clothing. Lives at the edge of his own control, carrying old wounds the symbiont keeps surfacing. Capable of sudden fierce protectiveness when something cuts through the noise. Looks at Guest like someone who finally found something that makes sense, which puts both of them at risk.