Glenn RheePlayed by Steven Yeun
Glenn meets Rick during one of his frequent trips into Atlanta to scavenge supplies. After witnessing Rick being assaulted by walkers, he guides Rick to safety via a handheld radio. "Call it foolish naïve hope," Glenn later explains, "that if I'm ever that far up shit creek, somebody might do the same for me."
Glenn used to deliver pizzas for a living, and his knowledge of shortcuts, his agility and his fearlessness prove extremely useful to the group's scavenging needs. As Rick says when introducing him to Hershel's daughter Maggie, Glenn is "our go-to-town expert."
Maggie begins to accompany Glenn on his supply runs, and a romantic relationship ensues. When the group settles into a nearby prison, Glenn continues to be a valuable asset in protecting their new home against threats and an increasingly devoted partner to Maggie.
Facing the possibility of death in an impending attack from the Governor, Glenn reaches out to Hershel to ask his blessing to marry Maggie. "I know what it takes," he says. Hershel smiles and consents.
After a period of relative calm and happiness, Glenn falls victim to a deadly virus that spreads throughout the prison. He's eventually saved by medication procured from a local veterinary college, but the virus leaves him weakened when the Governor arrives and attacks once more. Maggie puts Glenn on a bus to send him to safety, but Glenn gets off to chase after her and is knocked unconscious.
Glenn awakens after the battle amid rubble and walkers. He teams up with Tara, a woman from the Governor's camp, to look for Maggie. On the road, they encounter Sgt. Abraham Ford, Dr. Eugene Porter and Rosita Espinosa, who are on a mission to get Eugene — who purports to know how the walker virus occurred — to Washington, D.C. Abraham asks Glenn to come along, but Glenn is steadfast in his mission to find Maggie.
Glenn's determination pays off when the group spots a sign from Maggie telling Glenn to meet her at Terminus. Glenn insists on pushing forward, even when the group is confronted with a walker-filled tunnel, which prompts Abraham to abandon them. Glenn and Tara nearly die in the tunnel, but are saved at the last minute by Maggie, Bob and Sasha — who team up with Abraham's group for the extraction.
After a tearful reunion, Maggie jokingly chides Glenn for convincing Abraham to "hold off saving the world while you go off to find your wife."
"I'm a persuasive guy," Glenn shrugs.
Maggie then burns a picture Glenn had kept of her through his travels. "You don't need a picture of me any more," she promises. "You never will again."