Kratos, the main character in the God of War series, was a jerk before the series was reestablished. The earlier Kratos was hell bent on revenge against the pantheon of gods who tricked him into murdering his family.
Kratos grew up with God of War's Norse remake. He was depicted as a widower who was left to forge a relationship with his son, Atreus, after leaving his past behind. It isn't long before the past catches up to him and he's forced to reckon with his child, learn the family history and protect him from the Norse gods. Kratos eventually learned how to talk to his son in more than monosyllables and grunts as a result of the story.
The first game in the series revealed that Kratos' son, Atreus, is actually the god of the gods, and that the end times are upon us. With Kratos desperate to find a way to keep his son safe while allowing him to embrace his divine identity, the stakes are much higher for the main character. Kratos' role as a father and a character in general continue to change. The sequel to God of War raises the question of how Kratos will act once his relationship with his son is tested.
Santa Monica Studio knew that their newest game would show Kratos moving further away from his original character. The narrative director wrote in an email that his team knew they wanted Kratos to evolve in both big and small ways. In the previous game, Kratos told Atreus that the pair must be better in order for him to progress.
The father and son relationship is strained when Atreus goes against his father's will in pursuit of his own identity.
The actor who portrayed Atreus in both God of War and Ragnark explained in an email that he and Atreus are about the same age.