Let’s begin with a definition. What is a Christian leader? Broadly speaking, a person is more or less a Christian leader as that person exerts more or less Christian influence in Christian ways. Or to put it another way, to the degree that you shape others toward the image of Christ you are a Christian leader.
That’s a very broad definition of Christian leadership, and should include every obedient Christian, because we should all be influencing someone to be more like Christ. But if we get more specific, what we usually mean by a good Christian leader is someone who is really good at influencing others toward Christlikeness. They have personal strengths that draw others into the sway of their influence and lead them to the ways of Christ.