For the most part, if she is overwhelmed by too many negative emotions she'll fall unconscious. Depending on the amount, she'll sleep for a few days or may get up feeling sick and exhausted.

Now if she encounters a character with a grudge that lasted a very long time (say over a thousand years), then she may begin to get darker skin tone and become possessed by the emotion, changing her alignment from a guardian spirit to a demon until she is purified.

I doubt we have any characters with a grudge so fierce, so I don't mind having her getting sick/passing out and feeling more vulnerable to the effects of the void even with the SCA (but let's be honest, she isn't wearing the SCA in the train rn).