Despite the death and destruction that lurked around every corner in Hajime Isayama's Attack On Titan, the creator to the series decided to have one of the biggest characters of the franchise make it to the finale alive and well. While Levi was originally slated to meet his end in the final chapter of the manga, the creator made a decision to change course and save the Captain of the Scout Regiment that became a fan favorite.
The whole thing was explained during an interview with one of Isayama's editors. It was there Shintaro Kawakubo discussed some secrets behind the manga's finale, and he revealed Isayama wanted to kill off Levi before changing his mind.
"The opposite of what ending Levi got in the last chapter was an option at one point," Kawakuo admitted. "Isayama said it is okay to have a story where Levi dies."
However, the Attack on Titan editor did not feel the same. Kawakubo said he had a meeting with Isayama any time the artist wanted to kill off a character. These meetings were held to discuss whether the death was meaningful or not. So when the pair talked over Levi's end, Isayama could not find any justifiable reason to kill the captain.
"If a character's death is meaningful, then so be it. We try to figure out whether the death is meaningful from the story's perspective. In Levi's face, Isayama reconsidered his decision."
Thankfully, Levi survived the finale of Attack on Titan, but he did not come out unscathed. The hero saw his closest friends die in battle, and he was gravely injured during his battle with Zeke before earning a few more scars. But in the end, he helped bring forward the vision Erwin held for years, and that is enough to make life worth it for the fighter.