You do not characterize by telling the reader about the character. You do it by showing the character thinking, speaking and acting in a characteristic way. You simply show it and shut up.
Gene WolfeWe choose--or choose not--to be alone when we decide whom we will accept as our fellows, and whom we will reject. Thus an eremite in a mountain is in company, because the birds and coneys, the initiates whose words live in his 'forest books,' and the winds--the messengers of the Increate--are his companions. Another man, living in the midst of millions, may be alone, because there are none but enemies and victims around him.
Gene WolfeWoody Allen once said: "You know there must be intelligent life in space. The question is do they have good Chinese restaurants and do they deliver?" Which is really a joke, but it is also a very profound remark. When you say do they have good Chinese restaurants, what you're really saying is, "How much are they like us?" And when you say, "Do they deliver?" you're saying, "Can they get here?" Both of which are profound questions. And at the present, we have no answers.
Gene WolfeAll of us... when we think we are talking most intimately to someone else, are actually addressing an image we have of the person to whom we believe we speak.
Gene Wolfe