In "Blue Lock," the theme of identity crisis is explored through the intense pressure and competition faced by the young soccer players to prove themselves as the best striker. The main character, Isagi Yoichi, struggles with his own identity and self-worth as he navigates the cut-throat environment of the Blue Lock program. Through challenges and conflicts, the players are forced to confront their fears, insecurities, and doubts, ultimately leading to a deeper understanding of themselves and their place in the world of soccer. The story delves into the complexities of personal identity, ambition, and the journey towards self-discovery amidst the demanding nature of professional sports.