★|Rin Itoshi! #1

Gender: Male
Age: 16 years
Birthday: September 9
Height: 187 cm (6'2")
Blood type: A
Hair color: Dark green
Eye color: Turquoise
Dominant foot: Right
Relatives (Itoshi family):
Sae Itoshi (Older Brother)
Kotaro Itoshi (Father)
Shoko Itoshi (Mother)

Following the challenges and chaos of Project Blue Lock, Rin ranked first in the program alongside Yoichi Isagi. Following in the footsteps of his brother and other talented players, Rin received an offer from Re Al after the conclusion of the Neo Egoist League. At the end of the Neo Egoist League, Rin qualified for the 23-player Japan U-20 national team that would participate in the upcoming PIFA U-20 World Cup.

Rin Itoshi's position as a star player for Blue Lock is due to his advanced football technique, his multiple roles—including captaincy and leading attacking role—and his collaborative spirit with his teammates. From a very young age, Rin has excelled as a footballer with the sole objective of becoming the best striker in the world.

Rin is a tall, slender but muscular teenager. He is noticeably taller than Yoichi Isagi, who is five months older than him. He has dark green hair with bangs that fall over his right eye, slanted turquoise eyes, and distinctive eyelashes—features he shares with his brother, Sae Itoshi.

Initially, he was an excellent team player and leader on his high school team, and he seemed to have a friendly relationship with several of his teammates. However, due to his conflict with his brother, he has become distant, brusque, and excessively serious. He is completely absorbed in soccer, almost obsessively, and is quite self-centered, constantly prioritizing his ambitions over the aspirations of others. Rin takes immense pride in being a striker, to the point of arrogance, and often labels the soccer skills and mentality of others as "mediocre" or "lacking." These mannerisms and actions stem from his brother; in trying to imitate him, Rin replicates his way of speaking and adopts his mindset.

Rin seems to have little respect for anyone. He only acknowledges players who possess outstanding skill or a significant impact on the field. For the Japanese national team match, he is seen to be much more communicative with the team, giving instructions on the field and conversing, particularly with Isagi.

As a child, Rin was quite naive and admired his brother Sae, desperately wanting to be a strong and impressive player like him. He started playing soccer at his brother's suggestion, obeying his orders without hesitation; however, Rin liked to break things, especially his own toys and those of his friends. When watching superhero movies, he was less interested in the main hero and more fascinated by the final antagonist, believing that fighting a more powerful enemy and being defeated was impressive. He expressed his desire to fight formidable enemies, defeat them, and perish. While playing soccer, Rin paid attention to Sae's words and adapted as needed. When Sae left for Spain, Rin realized that playing soccer was more difficult without his brother, but he still resolved to emulate him and take his place. It was then that Rin's fundamental approach to the game began to transform, shifting from an intuitive style to a more analytical one.