So is it a good use of the word aloof to say "She is not aloof to their harsh judgements"? The intent is to say that a person is aware of the perception others have of them. Thanks.
Depending on what the actual state of affairs is, you may use one of these.There are slight subtleties in the difference of meaning and usage.
Unaware which means 'having no knowledge of a situation or fact'.
She is not unaware of their harsh judgments.
Oblivious which means, 'not aware of or concerned about what is happening around one'.
She is not oblivious to their harsh judgments.
If you are saying that she is aware and affected by them, then you may use impervious.
Impervious means'unable to be affected by'.
She is not impervious to their harsh judgments.
I am using these words as you have paired them with 'no'.A positive sentence construction with their antonyms could work as well.