[Nihatclodra]

^

true, but it is still possible she's not fully dead yet. Doesn't the MC's grandfather eat a lot of those leaves too? He's not a zombie, and I'm pretty sure he's at least a little insane. Or maybe the MC added an extra ingredient to the potion, which might also explain why she can keep her sanity this long (And why Babu kept his sanity for so long despite being dead several days before coming back). and maybe the Rigor Mortis, etc is a side-effect of prolonging the potion's effect too long, along with the insanity. Too many variables and too many possibilities, but it would seriously be interesting is this were the case.

But I agree, long (un)live Sanka Rei!