This document introduces 6 characters for a thriller film:
Arlo, the protagonist who is the first to take a mysterious pill; Vita, a strong female character included for gender balance; Nixon and Annora, friends of the victims who show the contrast between normal and affected characters; Darius, an easily overwhelmed character; a dog with no identity that frightens the protagonists; and a mysterious man antagonist who places the pills and observes the victims without revealing himself.