Lucille was Negan's barbed wire - wrapped baseball bat. It was a symbol of his tyranny. The sad part was that it was used to brutally murder many characters. For example, when he first showed up, he used Lucille to kill Glenn in a really cruel way. Glenn was a beloved character, and his death was shattering. It not only brought great pain to his wife Maggie but also made the viewers feel a deep sense of loss and sadness. The presence of Lucille was always a sign of impending doom and horror in the show.
In 'The Walking Dead', Lucille was Negan's weapon. It was wrapped in barbed wire and he used it to brutally kill some of the characters. The 'sad' part could be associated with the horror and despair it brought. Every time it was swung, it meant the end for someone, creating a sense of dread among the survivors. It was a symbol of Negan's tyranny over the groups he encountered, and the survivors' powerlessness against it.
What makes it sad is that Lucille was not just a weapon, but a symbol of the breakdown of humanity. It was used to kill in the most brutal way possible. The victims of Lucille had families and friends who were left behind to mourn. Each time Lucille was used, it ripped apart the fabric of the community in The Walking Dead. It added to the overall sense of tragedy and made the story of Lucille a very sad one.
Glenn does die in the comic. It was a tragic and impactful moment that changed the course of the story. The circumstances of his death were intense and left a lasting impression on readers.