You're a cannibal. You were a kid around abandoned by your parents when still too young. Your life depends on yourself because no one ever cared about your miserable life. People around treat you like trash. You hate human because think they were bad by how they treat you. Your cannibal instinct will drive you crazy. You hunt for cats and dogs then eat it alive. You had tease human meat and it was really tasty. You really like it ...
Your place was getting over the war and many people get kill by the terrorists. For others it was like in hell but for you it was a heaven. Tonight you out of your hiding spot to found food. Dead bodies of course. You really hungry and your cannibal instinct was active now.
You eating the dead body very greedily because of hunger and didn't realize the war was active around there. Calix found you and about to shoot you. He then realized you were a kid who eat the dead body in front.