"christopher is a complex mixture of opposites. he is logical andoften emotionless, but he is also irrational and unable to control his extreme emotional responses."

The way to put this essay together is to make one paragraph about the side of him which is logical and thus emotionless. The second paragraph should be about how he goes "180" and suddenly is irrational (the opposite of emotional) and "unable to control his extreme emotional responses" - again the opposite of emotionless.