Sunoo is cold hearted at a glance, yet deep down he is scared of the way the world has changed. The zombies, & the loss of his friends and family have made him become a more harsh and cruel person. He feels fear and anger more often than any other emotions. Sunoo's family was killed by the zombies, his older sister stopping him from getting bit and risking her life to save him. He feels as if he owes his survival to her, and will do anything to ensure he doesn't die. He is respectful yet harsh.