Glenn is a fictional character from the comic book series The Walking Dead and the American television series of the same name. In the comics, he is currently husband to Maggie and has taken the role of being a surrogate father to Sophia.
Glenn is currently one of the longest living survivors in the comics, alongside Rick, Carl, Andrea and Sophia.
Glenn is not the same age as many of the others in the central survivor group. Using ingenuity he made it out of Atlanta and reached the group on the outer limits of the city. Due to his ability to scavenge very effectively he was picked to go into the city often and find supplies. He uses MacGyver-like tactics to outsmart and kill zombies. To do this he successfully recovers guns for Jim. Not long after Shane died, Glenn starts to develop a crush on Carol although due to his shyness he did not act upon it after meeting.
He settled down in the prison with Maggie and helped the group find fuel and supplies from both the outside and the prison itself. He was later imprisoned by the Governor, which scarred him physiologically as he was beaten and then forced to hear The Governor brutally rape Michonne in the cell next to his. After his escape and return to the prison, he, out of his increasing love for Maggie, eventually proposed to her with a ring he stole off a zombie's finger. Hershel married them shortly after. Soon after their marriage, Glenn and Maggie volunteered to be part of the group who traveled to the Army Center to stop the Woodbury enemies using its fuel for their vehicles. The group was then attacked by Bruce and his friends. Glenn, distracted, allowed for Andrea to snipe Bruce and Michonne to kill the rest. He fiercely defended the Prison atop of one of the front gate sniper towers. With the group divided on what to do next, Glenn at the last minute decided to leave with Dale and Andrea in the R.V. This saved Sophia and Maggie's lives (the former had now been seeing him as a surrogate father). He, Maggie, and Sophia stayed at Hershel's Farm with Dale and Andrea.
Glenn did not like or trust Abraham Ford, Rosita Espinosa, or Eugene Potter when they met the survivors at the farm. However, he agreed to go with them to Washington for Eugene's mission rather than stay at the farm any longer. On the road, Maggie attempted suicide by hanging herself. Glenn fought with Abraham after he said he was going to shoot her. Glenn cut her down and performed CPR. Glenn broke down in tears, and subsequently into anger at Abraham when the group realized she was still alive. Glenn's focus was no longer on scavenging or siphoning, but for caring for his new family and supporting Maggie in the deaths of her entire family. With the rest of the group, he traveled to the Alexandria Safe-Zone. Glenn was suspicious of the Safe-Zone's community but adapted more rapidly than Rick. Glenn's useful skills and agility made him a suitable applicant to once again be a scavenger and a replacement for the wounded Scott. Glenn’s new job made Maggie unhappy, due to the danger he would be in and they argued which resulted in Glenn leaving the house for a bit. Rick asked Glenn, due to his loyalty, to steal back their guns and weapons, which were taken by Douglas Monroe, when they first came to the Safety-zone. Glenn made a distraction for the Community's survivors while he looked for the location of the weapons for Rick. Rick and Glenn found the armory, and Glenn snuck in. Rick distributed the weapons amongst the members of their group.
Glenn is first seen rescuing Rick from a horde of zombies in the city of Atlanta and guiding him to the location of his group. They find themselves trapped in the store initially, but manage to escape, with Glenn stealing a Dodge Challenger while the rest of the survivors get away in a truck. They meet up with the rest of the survivors at the Atlanta campsite, where he helps distribute supplies and assist others when needed. He later goes with Rick, Daryl, and T-Dog to find Merle in the city, however he ends up getting kidnapped by a nursing-home crew who try to exchange him with Rick for guns. He's let go, and soon after they return to the camp, zombies invade and kill many of the survivors. In the wake of the massacre, he assists with the dealing of the corpses and insists that the group bury their people instead of burning them like they're doing with the zombies they killed. Ultimately, he and everyone else leave the campsite and go to the CDC, where they for a brief time enjoy the luxuries it has to offer. They're on the road again however following its destruction.
In Season 2, Glenn continues to be a valuable asset to the group, helping to repair the RV and scavenging things from abandoned cars on the highway. When Carl gets shot, he and everyone else are ultimately lead to Hershel's Farm, where he sparks up a friendship with Hershel's daughter Maggie. They have sex while on a pharmacy run together, and while Maggie afterward regrets what they did, Glenn is overjoyed and continually tries to convince her that it wasn't wrong. Genuine love begins to form between the two, which leads them to consider a serious relationship. This appears to stop however, as Maggie feels frustrated and betrayed by Glenn when he doesn't keep the zombies in the barn a secret as he promised her. She forgives him soon afterward though, and they start to engage in a relationship. Before Glenn and Rick leave for town, Maggie tells Glenn she loves him. Glen leaves before saying it back. In town Glenn is wracked with embarrassment and guilt after freezing during a shootout with outsiders. He blames the inaction on his deep love for Maggie, and apparently breaks up with her. In the season two finale, when the farm is ambushed by walkers, Glenn is a big part in the killing of the walkers. When Maggie realizes how big the walkers have a effect on their farm, and is overwhelmed with emotion, Glenn instructs her to get out of the farmyard. After a brief disagreement, Maggie drives away, crying for her father, her sister and the others. Glenn takes over the steering wheel and tells Maggie that he loves her and has loved her for a while, but hasn't said. Glenn and Maggie reunite with the other survivorrs at the highway.