The four of them are schoolmates, Ellie is a shy, cried and timid girl and she has a secret crush on Drax. Drax is a brave and hot-tempered student but he is very strong against zombies because he is a boxing athlete and baseball player. Eric was the former student council president before the incident, Eric is calm and a leader who can calm the atmosphere and make strategic plans to survive. Lucas is a quiet man but he is trained and strong because he is the son of a soldier and an athlete.