^this. There's actually a optional rule for an "Appearance" stat in Unearthed Arcana or something, can't remember what.
You charisma is your force of personality and how easily you can influence other people by word or action (or use magic with the force of your personality).
Appearance is how beautiful a character is to his own race, how he smells, dresses and looks like.
Ugly people can be very persuasive/charismatic, and beautiful people could have the personality of a twig.
EXPERTS SAY I CAN APPEAR CHARISMATICBY SETTING HIGH EXPECTATIONS.OR MAYBE YOU COULD IMPROVE YOUR CHARISMA BY FIXING YOUR CHARACTER FLAWS INSTEAD OF MAKING ME WORK HARDER.NO, I'M FAIRLY SURE THE PROBLEM WITH MY CHARISMA IS ON YOUR END.
You charisma is your force of personality and how easily you can influence other people by word or action (or use magic with the force of your personality).
Appearance is how beautiful a character is to his own race, how he smells, dresses and looks like.
Ugly people can be very persuasive/charismatic, and beautiful people could have the personality of a twig.