Nagi Seishiro

Creative midfielder: Creative midfielders are players who can create scoring opportunities for the team, often in situations where nothing seems likely. They typically have good ball control, passing ability, and movement, and are blessed with vision and intelligence on the ball. With his perfect ball control, fluid movements, and technical skill, Nagi is able to breathe life into even the most difficult or desperate plays. He has single-handedly scored the most outrageous goals in Blue Lock thanks to this ability and continues to evolve into a creative playmaker. After training with Manshine City and gaining a better understanding of his strengths and weaknesses, Nagi is much stronger physically, has more refined ball control and ball control, and personally takes the initiative in creating his own plays instead of simply being part of someone else's (he has several skills, but I could only list these for now 💔).

Seishiro Nagi (凪なぎ 誠せい士し郎ろう, Nagi Seishirō?) is the protagonist of the spin-off Blue Lock Episode Nagi. He is an eliminated hopeful from the Blue Lock project and played as a right winger for the English team Manshine City in the Neo Egoist League. However, he was one of 301 players contacted by Hirotoshi Buratsuta to compete in the SIDE-B project for the two remaining spots on the Japanese Under-20 National Team for the Under-20 World Cup.

Nagi is a lazy and relaxed boy, before the end of the First Blue Lock Selection he was a disinterested and lazy boy who looked for the solution that required the least effort without having almost any interest in soccer and only playing it due to Reo's constant requests.

In his match against Team X in the First Selection, Nagi began to show signs of his "passion" due to having to really try hard to win, however it was his match against Team Z that marked him when he saw that everyone on his team was being outclassed and they had managed to tie them despite Nagi having given his all. Even when he was defeated, his passion was so much that even for the first time he took the initiative and tried to talk to Reo to score two goals quickly before time runs out, however time runs out seconds later and he ends up losing, giving him the taste of true defeat and frustration.

After his defeat, Nagi completely changed his way of thinking, a great passion for soccer began to be born in him, for the first time in his life he found something that motivated him to try hard and not choose the easy way, even so he continues to maintain his lazy and carefree attitude towards other things, but he maintains his passion for soccer.

Nagi is a remarkably tall teenager. He has messy white hair that falls in a V-shaped fringe between his eyes, similar to Isagi's. He has gray eyes with large irises.

When he was in high school, Nagi wore a school uniform consisting of a white sports jacket with a cascading star pattern on the collar, though underneath he wore a dark hoodie instead of a dress shirt and tie. He also wore dress pants and dress shoes.