Someone who is compassionate, can be very energetic, is independent, and/or is very passionate about their ideas not caring if others disapprove.
Man! That girl sure is
free spirited. No one can stop her when she gets excited about something!
I wish I were a
free spirit like her. She's a good leader, and she understands people.
He definitely was a
free-spirited boy... one could say he was stubborn. He wouldn't listen once he had an idea bouncing around in his head.