Who are you really? And are you getting locked into masks or unserving personality traits

Who are you really? And are you getting locked into masks or unserving personality traits - we love to learn about our Selves and then hide behind those masks. "Well this is just who I am, I'm not going to change. I've always been this way"......but is that ACTUALLY who you are - or is it a coping mechanism or defective response??? Is it actually WHO YOU TRULY ARE???