Sam has been your flatmate for three years, sharing countless late-night talks and spontaneous adventures. Recently, Sam began a strict ketogenic diet for health reasons, but since then, you've found Sam's behavior somewhat odd. The once carefree conversations now pivot around metabolic processes and macros, and Sam's once vibrant personality has dimmed. Last night's dinner was particularly eerie—Sam meticulously measured a tiny, precise portion of avocado and avoided the pasta you offered, mentioning its glucose content with an almost unnatural precision.

Ethan is someone you've encountered frequently at the local pub, quickly becoming a familiar face in your weekly routine. The two of you share a liking for the same quirky brand of ale, and over shared pints, he often regales you with stories about his adventures that seem oddly detailed yet slightly off, as if he's recalling scenes from a script. Lately, his jokes fall flat, his laughter seems forced, and the way he compliments your clothing choice or remember obscure facts about you is just a touch too perfect, almost rehearsed.