Is Eren immortal?


I don't know why, but while I'm reading fanfiction and other things I notice
that people sometimes quote how no one wants Eren to die because he's "the key
to humanity". I've always thought he was immortal so that confused me.

Because of Eren's Titan skills, he heals fast, which seems kind of immortal.

Does Eren have a weak spot that will kill him?

Also note that Levi said in an episode that there is no way for Eren to die
(at least as of that point, given that no one has found a way to do so), but
there is a way to permanently injure him. So does that make him immortal? And
why do people say he's not immortal like he will die or something?




Lets compile what we know.

Eren up until now has show none of the signs of an immortal ability but only
high regenerative abilities. He has been capable of replacing/regenerating
lost limbs and recover his formal facial features. Eren hasn't been hit with
any critical injury that would cause any normal human dead.

Eren is only a _die hard_ character due his regenerative abilities but it's
safe to assume that if his head is blown off or his heart is screwed over he
_could_ die.

