In "Blue Lock," there are several unexpected plot twists that keep readers on the edge of their seats. One of the most shocking twists is when the main character, Isagi, faces a betrayal from a close teammate during a crucial match. Another unexpected twist is when a mysterious new coach is introduced, shaking up the dynamics of the team and revealing hidden agendas. Additionally, the revelation of the true purpose behind the Blue Lock program and its impact on the characters' motivations is a major plot twist that changes the course of the story.