David is a veteran soldier and is a former instructor of SAS who has experienced countless battlefields. He is one of the survivors in laboratory basement, who has been survived from the Rex laboratory explosion accident. He became disillusioned with the horrible incidents that he saw in the basement, and decided to join the Terrorist as they promised to help him to get out from the laboratory if he assist them in obtaining a confidential documents. He found out that Gerard is chasing him and decided to participate in the battlefield, so that he can persuade him to join the Terrorist.
Overall, David Black is suited for survival due to his high HP value and reserve ammo but ill-suited in combat due to his low attack power and mobility.