She is not immortal numbskull, she just can instantly heal herself when she is using her "special jutsu" (yes i forgot the name). However, once she runs out of chakra, like any ninja, she dies x)
<div class="bbWrapper">well...immortal 'till she runs out of chacra... <br />
but not really immortal.<br />
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She is now dead, so no
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</blockquote>Nope she is not dead yet...just wait we'll see what will happen tomorrow...</div>
She is immortal when she has her forbidden jutsu activated, she said it herself in the manga, that while its active, she can never die in battle, NEVER. If your to stupid to understand thats immortality then youre retarded, sorry.
she can regenerate any wound as far as even regenerate organs so as long as she has chakra she gains a form of immortality in battle. Meaning she can't be killed in battle, but even then if you cut her head of for example she would still die, and i doubt she can regenerate after a Dust release jutsu.
So Immortal? NO