Is it charisma +2?
If her charisma has been boosted +2 would that be d12 + 4?
I just now realized her special power says "arcane die + d6" and not "arcane check" so I've been thrown into confusion.
On a related not I always assumed the "add 1 die" of the blessing cards means just that, whatever die you are throwing add one more. But now I'm questioning whether you throw the modifiers in there too.