Blue Lock's intense training program in the manga series is designed to push the players to their limits both physically and mentally. This high-pressure environment can have various impacts on the players' personalities, such as increasing their competitive drive, developing their resilience, fostering teamwork skills, and in some cases, leading to emotional breakdowns or conflicts. The training at Blue Lock can challenge the players to confront their weaknesses and insecurities, ultimately shaping them into more well-rounded and determined individuals on and off the field.