Jorge was part of a group of survivors that traveled through the nothwest. According to Jorge, there were almost no other survivors left. He and his fellow survivors were hunting the Chimera or vice versa.
At some point, Jorge was hiding in a forest while watching his friends being killed by the Chimera. According to Jorge, the Chimera used their bare hands to tear apart his friends.
After this traumatic experience, Jorge admits he didn't know the Chimera were that strong and that he was ready to die at that moment. Fortunately, the Chimera never found him. Jorge still feels guilty because he choose to hide instead of helping his friends.