Some people try to hide their inner
nerd behind a streetwise or athletic facade, or some other facade they think will
get people to hand over a key to
something. They try to out disarm anybody that might try to disarm them, to the point that it's kind of silly.
He/she had learned to keep his/her
extrovert facade most, if not all of his/her life so that most people that had met him/her and didn't know him/her well would believe in it, though it had always been transparent to
one or
two that knew him/her well.