Jack

Jack is one of the 30 individuals aboard the bus to Nanakimura. He is a 16-year-old boy with a mysterious past. Jack has a mysterious past and doesn't reveal much in his introduction but it is know that he is receiving treatment for a tumor from his family. He has a calm, quiet personality but he can easily become aggressive and violent when aggravated. In Episode 3 , it is revealed that Jack was send to sent to juvie after stabbing one of his classmates and that his real name is Sasaki. He was severely bullied in school.