Lucadaw
If someone used Hemalurgy to take someones Feruchemical abilities would they be able to use that persons personal metalminds? Most relevantly perhaps to take that person's knowledge from their copperminds?
Brandon Sanderson
Yes.
Lucadaw
If someone stored their identity in an aluminium metalmind, then had their powers and metalminds stolen via Hemalurgy, then the person who took the powers used the aluminium metalmind to draw out the first persons identity would it permanently overwrite their personality with the original persons ? ( would kind of be a long winded way of stealing someone else's body and becoming immortal )
Brandon Sanderson
All Identity questions are a RAFO until I deal with it more in the books. (Sorry.)
WeiryWriter (in response to the first answer)
If the spike granting Feruchemy were to be reforged/split into two distinct spikes which are then implanted into two different people, could those two people "share" a metalmind (as in actually be able to tap something the other stored and vice versa?).
Brandon Sanderson
It's complicated, but no.
There would be too much of the other person mixed in. Both could use the metalminds of the person the Feruchemy was stolen from, but when they made their own, their own Identity would "muddy" the creation.