AuraTwilight
The Sorcerer of Smiles
- Location
- The Silver City
A perfect approximation is indistinguishable from the real thing, by definition. Her powers work by magic, infering if they directly interact with the soul is a guess, not a fact.
Without knowing how magic works, we cannot predict what magic requires to work. Simulating a magnetic north pole requires simulating a magnetic south pole, even if the latter was not spotted.
We know that magic is a manifestation of the soul; that's not a guess, that's a fact. We know that performing magic causes observable changes in the inner chemistry of someone's soul. Ergo, to copy a power requires looking at that aspect of the soul, because not all parts of magic are directly observable.
Bets Sayaka would get the same error from trying to copy a witch?
I've considered this and want to test it, but by Suzune Magica we know that a Magical Girl's magic is identical to her Witch magic, and that a power copier can handle both more or less the same.
The issue is likely with Sabrina.