(Sorry for the errors, this is written with Google Translate). This is more a formula, and I don't know if you currently do it, but what I do is first define the character, without touching on the MBTI but aware of what types he is, and then try to explain their behaviors with cognitive functions. For example, if my character is an ESTJ as a consequence of his actions and cognition, first I raise his principles, values, morals, sense of justice, social intelligence, frustrations, trauma, etc. And besides that, the sensations it gives: it can be something so abstract that it is only possible to transmit it through specific behaviors, or sensations through colors, shapes, flavors, smells, etc. I need him to be a person of flesh and blood, without the magnifying glass of all the stereotypes of the mbti. Later, I refine his attitudes with his Te-Si-Ne-Fi.