Jesus Christ was most certainly not an introvert. Think of His life! All that we know of His life, and of His character, suggests that He spent it constantly interacting with people. He served them, blessed them, healed them, taught them, ate with them, comforted them, cried with them. If Christ would have been in introvert, what would have been written about Him? What influence would He possibly have had? Would the Gospel writers have even known who He was? An introvert would not have called out to fishers on the sea, “Come, follow Me.”
I believe that one of Satan’s greatest tools today is to isolate us from each other. Many are introverts. I don’t think being an introvert is part of God’s plan. How are we to share the Gospel as an introvert? How are we to mourn with those that mourn if we don’t even know who is mourning? How are we to lift the hands that hang down if the only hands we ever see are our own? How can we make others feel welcome at our church meetings if we do not speak to them?
Friendliness, I believe, is a Christ-like attribute. It is a direct descendant of charity. If we love people, we will want to interact with them and get to know them and help them. Like Christ, we will want to be with them and teach them and eat with them and comfort them and bless them. Without charity, we truly are nothing.