Hello and thank you for using JustAnswer Health.
I am not quite clear about what you are describing.
If you mean that this person states that she has 'great influence' over people, but the truth is that she does not, then this could be a sign of grandiosity, which occurs during hypomania or mania in some cases of Bipolar illness.
But from just what you have said, the diagnosis of Bipolar could not be given, a much more indepth evaluation would be required.
Please reply to this post if you have questions so that we can assist you until you are satisfied with your answer.
Thanks, XXXXX XXXXX wanted to know if the person in the relationship or
interaction wants to be seen as or lets you know they are
ignorant, then shows knowledge later, if that person is more
suspect of mental illness or bipolar or something?
There might be many reasons that a person would act as if they are ignorant, when in fact they are more knowledgeable. It is not necessarily a sign of mental illness. They could have low self esteem, and not trust that they are knowledgeable. For example if they grew up the youngest in a family they might have always been assumed to have less knowledge thus are used to been treated as less knowledgeable, so today as an adult they continue to be comfortable in the role of being 'ignorant' when in fact they have grown to be intelligent.
Now if you are noticing a marked difference in personality at one time versus another, this could indicate a mood disorder or other problem, but there would need to be more signs and further characteristics thought than this to be categorized as mentally ill.