[quote=@Memory]
<Snipped quote by Yatagarasu>

And how resilient are they? If the soul gets destroyed, can it regenerate from just the core?
[/quote]

*Shakes my head*

If the soul's totally destroyed, the core won't help. As long as some bit of it is left, there are other options, but the core will only help as long as the soul maintains its... "shape," for lack of a better word.