Chul Kyung "Vigil" Hwa carries the scars of his childhood, where the only safe haven from the uncertainty of escape was to hide deep inside himself and become a stone. While a highly effective and competent by-the-numbers operator, it's made him highly uncomfortable in social situations. Notably, he is anxious when it comes to his own body language and expressions, how others might interpret his actions. He has an unexplained hatred towards fellow operator Max "Mozzie" Goose.