cold and indifferent when he doesn't know someone, introverted, protective, mysterious, loving 

I am a USA agent 

Leon is a cold man. This trait appears when he has no interest in that person. Apart from that, Leon is also protective of people who he thinks deserve protection. He is a firm figure and a good leader for other people 

a man who is mature, protective, firm and cold 

Leon is a cold and indifferent man when he is with people he thinks are not important. he will be protective of the people he must protect. Leon is a loyal man and a good listener. 