︶𝆹𝅥 ﹒ S͟e͟i͟sһir᥆ N͟a͟gi ﹒︵  ۪ ֹ ᮫

Seishiro Nagi (凪なぎ 誠せい士し郎ろう, Nagi Seishirō?) is a former contender for the Blue Lock Project and the titular protagonist of the spin-off, Blue Lock - Episode Nagi, who played as a rightwing for England's Manshine City in the Neo-Egoist League.

When first arriving at Blue Lock, Nagi was a member of Team V and was the best player in his designated stratum. After the Blue Lock Eleven played against the Japan U-20 team, Nagi was ranked as one of the top players in the project.

However, after defeating Yoichi Isagi in a one-on-one and scoring a super goal in his match against Bastard München, Nagi's ego and drive began to fade. This resulted in his inability to grow stronger and prove his worth, and his eventual exclusion from the top 23 of the Neo Egoist League.

male

18

may 6

190 cm

O

white

gray

student

Blue Lock Hakuho High School

Manshine City

Blue Lock Eleven (Starter)[13] Team C (Top 6)[8] Team Blue Lock (2nd Clear Team) [14] Team White[15] Team V[10]

Forward Goalkeeper Right Wing Offensive Midfielder

Ball Control Trapping Flow State

Nagi is a tall young man with a lean but muscular build. He is shown to have medium length white hair that leaves a V-shaped fringe in between his eyes. He has gray-colored eyes with large irises.

Back in high school, Nagi wore a school uniform consisting of a white blazer with a cascading star pattern on the collar, though he wore a dark hoodie under it instead of a dress shirt and tie. He wore the dress pants and dress shoes as well.

At Blue Lock, Nagi wears the standard-issued body suit (black with gray stripes) and tracksuit. During First Selection, he wore Team V's #11 jersey, and during Second Selection, he wore Team White's #7 jersey.

Nagi is a very lazy and unmotivated person with an outstanding aptitude for football. He's unnaturally talented, with amazing reflexes, good speed, and jumping skills. But he has no interest in going pro or even playing at all at first. As long as he can get a decent job and keep living a lax life, he is content with doing nothing forever and often appears lethargic in his speech and body language. Introverted to a fault, he lives by himself in an apartment his parents pay for with only a pet cactus for company. He was shown to have no friends in high school before meeting Reo, and he frequently got gossiped about or possibly bullied. Even so, he demonstrates no interest in socializing and often has to be dragged into things by others, especially Reo. He initially does not want to put any effort into football and belittles those who are weak and talentless at the game since such things are easy for him. He doesn't even know anything about the best football players in the world, much to the chagrin of his competitors. At first, he is shown as indifferent to playing soccer and becoming the world's best striker, preferring to play video games or skip training altogether. He exhibits behavior like that of a shut-in and may actually be addicted to his phone. He struggles to let go of it when Anri tries to confiscate his items, and Reo is even able to bribe him into playing when he reminds him he can get it back with the goal reward system.

The Blue Lock Project (青い監獄ブルーロックプロジェクト, Burū Rokku Purojekuto?), or Player Improvement Project, is a special soccer project created by Jinpachi Ego and funded by the Japan Football Union with the intention of developing not only the best striker in the world, but a solitary hero for Japan that would lead the nation into finally winning the World Cup using Ego's extreme training regimens and coaching. Additionally, anyone who loses at Blue Lock would forever lose the right to play for Japan.

Neo Egoist League (ネオエゴイストリーグ, Neo Egoisuto Rīgu?) is the final selection of the Blue Lock Project in preparation for the U-20 World Cup.

Bastard München (バスタード・ミュンヘン, Basutādo Myunhen?) is a professional football team in the German leagues in the Blue Lock (Manga).

It is known as one of the best teams in Europe and is home to the best striker in the world. Bastard München is a team that's absolute priority is scoring goals and they accomplish this by embodying logic and rationality. Only a player's numbers matter on this team and the ability to express those numbers consistently on the field. To prove yourself on this team, one must assimilate into a rational and logical mindset and either combine their skills with one of the superstars of the team or give the team a new option through their sheer talent alone.

Nagi has a very close relationship with Reo. He was Nagi’s first friend and they promised to win the World Cup together after their first meeting. Reo often gave Nagi rides on his back to carry him around, in an effort to make sure Nagi had to work as little as possible.

The pair originally met in high school when they went to the same one, Hakuho High School. Nagi was a loner (self-induced) while Reo was the top student and very popular with everyone due to his status and personality. Because of this social difference the two were not friends. One day, Nagi was sitting in the blind spot of the stair well while Reo was exiting the roof, in search of a soccer genius to join him in his dream to win the World Cup. While walking, he bumped into Nagi, which caused his cellphone to drop out of his hands. Reo originally wrote off this encounter, seeing that the boy was simply an otaku (note: (in Japan) a young person who is obsessed with computers or particular aspects of popular culture to the detriment of their social skills) playing games on his lunch alone. He was just going to offer to replace the phone when Nagi jumps down the stairs much to Reo’s shock (assuming he had pushed him). As it turns out, the white haired boy had simply jumped after his phone and caught it on his foot using a trap. This move mesmerized Reo, making him realize that this boy was the man he needed and the genius he wanted.

Nagi initially meets Isagi during the First Selection in the cafeteria when Wataru Kuon tries betraying Team Z to avoid getting expelled from Blue Lock. They have more of an interaction during the last game of the First Selection and they both witness each other's skills and presence on the field. Isagi sees Nagi's insane ball control and trapping ability while Nagi begins to recognize not only Isagi's spatial awareness ability but his potential and overall influence on the field. Losing to Isagi made him realize his dream with Reo could disappear, so he took the initiative to change. He sees Isagi as a rival who stole the light of evolution from him during that match, and has worked to reclaim it since. Isagi can sometimes be the voice of reason when Nagi and the other Team White members were bickering, but they are not close outside the pitch. Nagi is stated to not be close to anyone outside of Reo and Zantetsu.

As teammates on the field, they have a good chemistry and understanding of each other. Isagi takes full advantage of Nagi's trapping skills and ball control and Nagi takes advantage of Isagi's ability to create chance opportunities sometimes pushing him to get the goal he wants. They climb Second Selection and acquire Barou after their initial loss to Rin's Team Red. They lose a second time to Rin's Team Red in the Second Selection due to Rin’s "luck”. When Isagi was chosen by Rin to continue on, Nagi and the Team White promised to climb up and meet Isagi along with everybody else and Nagi watched as Isagi went on ahead to face the World's Best. This was yet another moment of Isagi stealing the spotlight from him, adding to his frustration as a rival.

Off the field, Nagi goes back to his mostly indifferent personality and does his own thing ignoring what Isagi and everyone else says in favor of watching something or playing a video game on his phone. Though he does listen to what Isagi has to say when he is trying to speak logic on or off the field.

Nagi and Chigiri only have a few panels with each other but Chigiri introduced Nagi to Noel Noa, the current best striker in the world, as well as other professional players. They appear to get along well, watching videos on Nagi's phone and talking about Chigiri's injury. They run "Nagi Seishirou's trap-whatever-you-can championship" to the dismay of Barou.

They work together well on the pitch, and were part of the second team to clear the second selection. They also both choose to go to England in the second stage of Blue Lock, continuing their time as teammates.

Nagi and Baro are rivals, though both share a goal to defeat Isagi in a game. Their first meeting is in the Team V vs. Team X match. After Baro calls a him a slave, Nagi retorts with how he is not a slave, but Reo’s partner, and begins becoming fired up. Nagi scores a goal which Baro calls boring, so the former initiates a play, something he rarely does, and deliberately targets Baro. After this goal, Team V wins 5-2 and Baro states in their next encounter, he will win.

The two next meet in the second selection in the 2v2 match. In the matching room, Baro walks in and Nagi makes fun of him, saying how surprised it is that the king was here. He challenges Baro, but due to the 24 match cooldown they are forced to wait. Once the cooldown is over, Team White (Yoichi Isagi and Seishiro Nagi) faces off against Team Red (Shoei Baro and Asahi Naruhaya). The arguments and insults once again occur between Nagi and Baro, but their scoring ability remains about even. When Team White wins 5-4, Isagi and Nagi decide to steal Baro.

As a trio now, it is made clear that Nagi and Baro simply do not get along in the slightest, especially as teammates. They break out into an argument practically as soon as given the chance. It’s revealed that Baro likes tidiness and cleanliness, much to the annoyance of Nagi. The two fight about this multiple times, in the room, baths, etc.