Yoichi Isagi, the main character in the manga "Blue Lock," experiences several internal conflicts throughout the story. Some of the main conflicts in his internal monologue include self-doubt about his abilities as a soccer player, the pressure to prove himself and live up to expectations, the fear of failure, the desire to stand out and be recognized, and the struggle to find his own identity and purpose in the competitive world of professional soccer. These conflicts drive Yoichi's character development and shape his journey as he navigates the challenges and opportunities that come his way.