I harbour a conviction that charisma is largely a skill, but being extroverted makes it easier to acquire. One of my best friends is a prom king daredevil life of the party type, but I know him pretty well after 3 decades. He's bipolar, extroverted, and knows exactly the way to put up a front that will get people in a party mood - which is something he only does during a manic phase. When the high gives way to the low, he turns into more of the spooky enigmatic recluse type. The trick is to befriend both.