Who knows me best?

My best friend, father, mother sis naa. This question is actually much harder to answer.

Since, in life you share and spend time with lot of people its hard to tell who knows you best. Technically, you yourself live with you, so you must know best about yourself.

There are four aspects of our personality.
So sometimes we know ourselves better we have access to more information about ourselves.

Sometimes, others knows us better because standing outside they can take a full view of us, which we being a part of system under observation may never see. also, we might be prejudiced in our judgement