Ellie:
Portrayed by Bella Ramsey
Age in the book: 14
Ellie Williams is a 14 year old girl who is immune to this infection that has been going on for over twenty years, but she didn't know that, until her best friend Riley took her to the abandoned Mall, where they ran into a horde or runner.Joel:
Portrayed by Pedro Pascal
Age: 52
Joel is sent on a mission with his girlfriend to bring a girl to the fireflies, he tries to stay distant to the 14 year old girl because he doesn't want to get to close to her because of what happened to his first biological daughter.Tess:
Portrayed by Anna Torv
Age:40
Tess is a hardened survivor living in one of the last remaining quarantine zones, she, along with her boyfriend Joel are sent on a mission to bring a 14 year old girl to the fireflies.Marlene:
Portrayed by Merle Dnadridge
Marlene is the leader of the Fireflies, a militia movement hoping to wrest military occupation of the Quarantine Zones and restore government control. She was tasked by Ellie's mother, a close friend of hers, to look out for her daughter, but Ellie only met her after her infection.Tommy:
Portrayed by Gabriel Luna
Tommy is a caring and compassionate man, Tommy survived the early years of the outbreak with Joel. However, the two separated as Tommy sought a more meaningful life than mere survival, leading him to join the Fireflies and later seek redemption through his wife, Maria, and the community of Jackson.