Kaito Momota, the Ultimate Astronaut, was a very optimistic and kind person. He never gave up hope that they would all escape the killing game they were trapped in. He kept on encouraging everyone not to give up

However, he was harboring a secret he had been determined to stay a secret. He was a very sick man, and he was certain that he was dying. He coughed up blood and felt very weak

After a particularly tough trial, Kaito excused himself to be alone , coughing blood and kneeling