Does Eren Really Die?

Unfortunately, yes. Eren dies at the very end of the series. ... After some time, Mikasa is able to enter into the mouth of Eren's Titan form where his actual body is visible and she decapitates him.

Why did Eren Die in Attack on Titan?

Eren died believing that the future he saw through the Attack Titan's power was the only path laid out for him. In the end, Eren's death was finalized after Mikasa arrived with his head and buried it under the tree that they cherished.

Does Eren really die in Season 1?

As they see the mysterious Titan defeating all of the other Titans before collapsing, they are shocked to watch Eren emerge from its body. Mikasa reaches Eren and cries upon confirming that he is alive, while Armin notices that Eren's severed leg and arm have somehow regenerated as well.