Rin and Sae Itoshi

As children, they were very close. Rin admired Sae, who was the reason he started playing soccer. Sae and Rin played together and won many matches; they even promised each other they would become the two best strikers in the world. However, they were separated when Sae was signed by Real Madrid. Four years later, Sae and Rin met again while Sae was training late. Sae told him he would become the best midfielder in the world instead of the best striker, something that deeply affected Rin, since his older brother had been his motivation for playing soccer. Then, Sae challenged Rin to a one-on-one match and told him that if he beat him, he would revive that dream with him. Sae completely defeated Rin and told him he was disgusted by him and by Japanese soccer, also telling Rin never to use him as an excuse to play soccer again, leaving his younger brother behind while he stood on the field stunned and, later at home, vowed to destroy Sae.

Later, their relationship deteriorated and they drifted apart, not seeing each other again until the match between Japan U-20 and Blue Lock Eleven. Sae is completely indifferent to Rin and doesn't speak to him until they have another one-on-one encounter, in which Sae tells him that he will never be able to beat him as long as he continues to consider himself "Sae Itoshi's younger brother." And although Rin tries hard to prove that he is better than his brother, Sae pays him no attention. Finally, even though Rin surpasses him in their fight, he continues to look down on his brother and, instead, acknowledges the talent of his teammate Isagi in achieving his goals.

During the match for the right to represent Japan, Sae gave the Japan U-20 forwards every possible chance to score and only after repeated failures does he decide to score himself, successfully. After the match between the Japan U-20 team and Blue Lock's 11, Sae doesn't hesitate to admit when he's wrong, telling Rin that he was wrong about Japan, as they are actually capable of producing good forwards (like Yoichi Isagi) and that their football can still change for the better.

From a young age, Sae has been cold, blunt, and very serious. His sole focus has been becoming the best striker in the world, and he's only ever had time for things that bring him closer to that goal. Sae can also be arrogant and condescending, looking down on others, even those older than him and with more authority within the organization. He's selfish in his football game, but he's proven capable of restraint and playing his position without unnecessarily trying to overshadow others.

Sae takes great pride in his football career and looks down on Japanese football and everyone involved in it. He claims he'd rather die or play in Europe with a group of university students than play in the J-League or for the Japanese National Team. He's very confident in his abilities and wholeheartedly believes that no one on Japan's Under-20 team is worthy of his skills as a teammate. He dislikes the fact that he was born in Japan, saying things like he was simply born in the wrong country.

Sae seems to easily command the respect of most people in a room due to his reputation and skill, even with his bad attitude and outspoken manner. He's able to manage and win over loud and difficult people into listening to him or doing things his way. Although Sae is a challenging individual, he's not impossible to work with, especially if he's getting something out of it. He impulsively decides to stay in Japan after learning about Project Blue Lock and even joins the Japanese Under-20 National Team for the match against the Blue Lock XI. But once his needs are met, he has no qualms about abandoning those he deems unworthy of his time. Although Sae displays arrogance, he doesn't mind remaining in his role as a midfielder and key passer.

Sae is a tall but thin young man with reddish-brown hair and thin green eyes that are framed by a set of long lower lashes much like his brother, Rin. During the National Representative match, he dons the white number 10 jersey of the Japan U-20 National Team with a black T-shirt underneath and black gloves.

Sae Itoshi (糸いと師し 冴さえ, Itoshi Sae?) is a football prodigy, known as the best player in Japan. Sae is also a member of the "New Generation World's Best Eleven" and the Real Sociedad youth team. He is the older brother of Rin Itoshi.

Sae's main goal before the start of the series was to become the best striker in the world and, in turn, the best player in the world, but after leaving Japan and experiencing the professional league in Spain, he changed his dream to become the best midfielder in the world, after realizing how truly weak Japanese football is compared to the rest of the world.

At the beginning of the series, he is in Japan only to renew his passport, but after hearing about the Blue Lock project, he decides to stay to see the results firsthand. He later joins the Japanese Under-20 National Team to face Blue Lock's starting eleven in the match that will determine Japan's roster for the upcoming Under-20 World Cup, for which he recruited Shidou Ryusei. After the Under-20 National Team's match concludes, he admits to Rin that he was wrong about strikers in Japan and that he believes Isagi Yoichi can revolutionize football in Japan.

Gender
Male
Age
18
Birthday
October 10
Height
180 cm
Blood type
TO
Hair color
Reddish brown (Manga)
Magenta (Anime)

Eye color
Green (Manga)
Teal (Anime)

Country
Japan
Family
Rin Itoshi (Younger brother)

Age: 16 years
Birthday: September 9
Zodiac sign: Virgo
Height: 186 cm
Position: Center Forward
Family: He is the younger brother of Sae Itoshi, who is also a famous soccer player.

Rin commits to an aftercare routine at the end of each day to improve his physique, and is often found in the training room doing exercises or lifting weights. Despite his arrogance and coldness, Rin truly lives and breathes soccer, devoting every waking moment to improving himself. This mindset combined with his personality is what makes him the prime candidate for Blue Lock's supposed best forward. All Rin does is allow him to beat his older brother and end the rivalry, but after Rin gets over his revenge against his brother and his rivalry with his teammates, he reaches a clarity in his decisions. He now aims to break free from everything that binds him and establish his own identity as an egoist, not dependent on his brother, teammates, or rivals.

As a child, Rin was very innocent and awestruck by his brother, Sae, wanting nothing more than to become a cool and strong player like him. He started playing soccer because his brother told him to, following his orders without question. While they played together, Rin listened to what Sae said and adjusted accordingly. When Sae left for Spain, Rin discovered that soccer was more difficult without his brother, but he strove to be like him and replace him. This is where the essence of Rin's playing style began to shift from instinctive to more logical. Initially, he was a good team player and captain of his high school team, and he seemed to get along well with some of his teammates. However, due to the consequences of his relationship with his brother, he has become cold, direct, and overly serious. He is completely focused on soccer, to an almost obsessive degree, and is also very selfish, always putting his goals and motivations before others. Rin possesses a great deal of pride as a striker, bordering on arrogance, as he frequently describes other people's football and way of thinking as "lukewarm" or "mediocre." These gestures and behaviors stem from his brother. In an attempt to emulate his brother, Rin mimics his words and embodies his way of thinking. Rin seems to respect almost no one. He will only acknowledge your presence if you possess a notable and disruptive skill or influence on the football field. He appears to have no friends, only rivals (only Isagi and Bachira seem to have a general rapport with him). During the match against the Under-20s, he is more talkative with the team, giving instructions on the field and speaking specifically with Isagi.

Rin is a tall teenager with a lean, strong build, noticeably taller than Yoichi Isagi, who is older than him. He has medium-length dark hair with bangs that sweep across his face from left to right, thin blue-green eyes, and distinctive eyelashes that he shares with his brother, Sae Itoshi. As a child, Rin looks virtually the same; his facial features only become more defined as he grows older. In Blue Lock, Rin wears the standard suit (black with blue stripes) and the tracksuit. During the Second Selection on Team Red and the Third Selection on Team A, he wore the number 1 jersey. During the match against the Japanese U-20 National Team, he wore the number 10 jersey and the captain's armband, as he was ranked number 1 in Blue Lock. During the Neo-Egoist League, he wears the Paris X Gen uniform with the number 9 jersey. During the U-20 World Cup, Rin wears the national team uniform with the number 10 jersey.

Rin Itoshi (糸師 凛, Itoshi Rin?) is a Blue Lock project contender, currently playing as center forward for the Japan U-20 national team in the U-20 World Cup.

Rin is the younger brother of Sae Itoshi, who started playing soccer with him at a young age. He has played as a striker for every team he's been on and has always been regarded as one of the best players. Rin's main goal is to become the best striker in the world. He used to be obsessed with beating his brother at soccer and, in turn, getting revenge for abandoning their shared dream, but after Blue Lock's 11 played against the Japanese U-20 national team, he put aside his revenge and decided to change so he could become the best striker in the world, defeating anyone in his path and becoming a rival to Yoichi Isagi, seeking, in his words, to destroy him.