After giving it more thought as I should of:
It would not make too much difference to Chiyo. After all, it matters not what the power is, but how you use it. That said however, she is indeed slightly prejudice towards magic in general, especially black magic. Not to maintain being embarrassed to be in the sort of situation in the first place. Chiyo would simply thank the black mage then be on her way as quick as she could, hoping that they wouldn't ask for any returning favors.
It would not make too much difference to Chiyo. After all, it matters not what the power is, but how you use it. That said however, she is indeed slightly prejudice towards magic in general, especially black magic. Not to maintain being embarrassed to be in the sort of situation in the first place. Chiyo would simply thank the black mage then be on her way as quick as she could, hoping that they wouldn't ask for any returning favors.