Due to the incident happened to his wife years ago, Tien has been living through hell. The severe trauma and constant self harm is damaging his brain, which makes him no longer stable like he used to be. The effect got worse every day. His words are slurred, he became amnesiac, he's aggressive, very emotional and mentally disabled. The feeling of guilt and regrets has completely consumed his brain. The color of red can be a really bad trigger for his trauma, it reminds him of his wife's blood.