Can note psychology judge a person's character?

I can't. A method of judging a person's personality by testing (including self-expression or projection techniques, etc. ) belongs to a psychological measurement technology. If it is psychological measurement, we should consider the reliability and effectiveness of the measurement method-that is, whether this method is reliable or not, whether this method measures what it wants to measure. Scientifically, a large number of strict sample data are needed to show that the reliability and validity of a test meet the standard, and it can only be used after it meets the standard.

What you said about judging a person's personality belongs to the category of personality psychology. The commonly used methods in personality psychology are projection method and self-report method, but because their reliability and validity are not high or difficult to measure, doctors and senior trainers can manipulate this measurement method in the later stage. What you said about note-taking psychology is not mainstream in personality test. Even as a personality test method, due to the characteristics of personality itself, there is no guarantee to accurately judge a person's personality.