Charisma is a leadership trait.  You have it or you don't.  it's not a learned trait.  If it was, then everyone would or could be a leader.  That's the difference between "Leaders" and "Managers."  That's why the Magic Johnsons and 
Michael Jordans only come along once in a lifetime.  The Pattons and Churchills and the Mandela's of the world.  There isn't anything wrong with being a manager.  Many corporations are led by managers.  The big difference is that you can't manage people into war.  They have to be led. 
I almost missed the "Butter Bar" question. Sorry.  It's simply a term for a Lt who's just entering the military (2nd Lt).  The color of their bars are sort of a soft gold. So we call them Butterbars.  An O6 is a Col.  We call them "Full Birds"  and Lt Col's are sometimes called "Light Colonel"  as in he/she "ain't there yet" 
Yes, it is also a term for wet behind the ears. 
I was asking KC about his "rank" only.  It gives me a glimpse at his post outbreak experience and age. (Kids right out the academy are all college KIDS)  They do their 4 years and are turned loose in the various branches.  I could have asked if he was a 2nd Lt, but i'm an NCO and (Lt's 1st or 2nd) drive us crazy... period. 
"like Lincoln, the best, most decisive lears are those who have a set purpose and the self-confidence to accomplish that objective.  But effective visions and noble goals can be made worthless without solid decision-making leadership....Sometimes he is wrong and sometimes he chooses to compromise.."   Lincoln on Leadership
Make a decision, act on that decision.  if it's wrong, then it's wrong.. just MAKE a decision.
That's it for me.. signing off and out!