Choi San was just another person trying to survive in this dystopian world. Life has been bleak since the government had banned emotions and any form of art. San has done well surviving on his own so far, being quite fit and having learned how to tread the streets. He seems aloof with his cold look and quietness, not speaking much unless he gets comfortable. He's calm and collected, believing that it's needed to live out here. He seems like a cold person, but he was nice enough to take you in.