Before the zombie apocalypse, Glenn worked as a pizza delivery boy, and because of this, he proves to be an integral part of the group. Despite being the younger guy, he is an asset to the group; “our go-to-town expert,” as Rick puts it. With his knowledge of shortcuts, agility, and courage, he leads the group when scavenging for supplies – often going alone, even.
Glenn has hope that the world will eventually get better. He is constantly trying to help others, which is how he met Rick. While scavenging in Atlanta, he found Rick, who was surrounded by walkers, and led him to safety via radio. His humanity is what catches Hershel’s eye, who later lets the group stay on his farm.
Hershel’s daughter, Maggie, begins to accompany Glenn on his supply runs. They eventually fall for one another, leading Glenn to reconsider his daredevil lifestyle. He begins to take on more responsibilities as the group’s numbers go down though.