Brothers_𝙸𝚝𝚘𝚜𝚑𝚒 ♡

A strict but not cruel mentor. Sae isn't one to coddle, but he knows how to set clear goals and demand discipline. He could treat his sister as a "project": noticing her strengths, building a system of training and study, and choosing the optimal development methods. His mentorship would be dry and pragmatic, yet highly effective.
Hidden care through control. He wouldn't say, "I'm worried," but he would always keep an eye on the situation: checking if she was getting home safely, if she was overloaded, if she hadn't fallen in with the wrong crowd. For him, care is about eliminating risks, not hugging.
Patience, built as a skill. Sae was used to working with imperfect teammates, so he would treat his sister's shortcomings as growth points: he wouldn't get irritated by her mistakes, but would show her how to correct them. At the same time, he wouldn't tolerate laziness or excuses: if his sister said, "I can't," he would respond, "Show me where exactly it's not working."
Rare but meaningful praise. For Sae, praise is a currency he spends sparingly. If he told his sister, "You're doing great," she could be sure it was truly outstanding. Such restrained praise would be more valuable to her than any admiration.
A focus on independence. He wouldn't solve his sister's problems for her, but he would teach her to solve them herself: analyze the situation step by step, identify weaknesses, choose the best option, and take responsibility.
An internal conflict between coldness and affection. Sae tries to avoid depending on people because he considers affection a distraction. His younger sister could become an exception, one he wouldn't know how to handle: he might sometimes keep his distance, then suddenly show concern, without fully understanding why.
How would he treat his younger sister in practice?

Hyper-responsibility and control. Rin would become an overly attentive caregiver: he would calculate risks in advance, ensure his sister doesn't get into trouble, and try to shield her from anything he considers dangerous or useless. For him, care is, first and foremost, about safety and stability.
A restrained warmth. He's not the type to shower her with affectionate words or offer hugs. His affection would be demonstrated through actions: helping her with homework, discreetly seeing her home, buying her something she likes, but never saying so directly.
High expectations. Rin tends to judge people by his own standards, so he might unwittingly expect his sister to be determined and disciplined. If she gets carried away with something he considers "frivolous," he'll try to gently (or not so gently) steer her onto a "more correct" path.
An inner vulnerability around her. Only with his younger sister could Rin allow himself to be a little less "stiff": admit a mistake, show that he cares, or even share doubts he would never voice to his teammates.
A protective instinct. If someone offends or underestimates his sister, Rin will instantly take her side—and do so in a way that will leave the offender long-remembered. For him, family is a zone where his standards act as a shield.
How could he treat her?
As a fragile treasure that needed to be protected. He would try not to show her his tough side, the one where he manipulates teammates and walks over heads to score. At home, he would strive to be a "normal older brother," even though it would take effort.
Through football as a common language. If his sister showed an interest in football, Rin would become her most demanding, but also her most effective mentor: he wouldn't pity her, but would teach her everything he knew. If she wasn't interested, he might be disappointed at first, then accept her choice—but he would still try to impart his principles to her: discipline, perseverance, and the ability to never give up.

Age: 18 years (at the time of the Second Selection).
Height: 180 cm.
Body type: slim, thin.
Hair: reddish-red (in the manga), but in the anime, it can be closer to a purple-crimson shade. His bangs are combed back to reveal his forehead—a style he's maintained since childhood.
Eyes: turquoise. Their distinguishing feature is long lower eyelashes (like his younger brother Rin's; however, Sae has one more eyelash on his lower arch—six, while Rin has five).
Other: His dominant foot is his left. During matches, he wears the white Japan U-20 team uniform with the number 10, under which he wears a black shirt and black gloves.
Character

Overall, Sae can be described as a cold, aloof, and straightforward person. Since childhood, he was serious-minded and hyper-focused on one goal: to become the best striker in the world. However, after four years in the youth system of Real Madrid, his worldview changed: exposed to world-class football, he rethought his ambitions and shifted his focus from pure goalscoring to a playmaker's role—controlling the game and creating chances for others.

Some character traits:

Arrogance and haughtiness. He often looks down on others, even if they are older or hold a higher position. He openly despises Japanese football, considering it not high enough, and has stated that he would rather die than play for the standard Japanese national team.
Pragmatism and detachment. In communication and in the game, he displays a cold calculation. On the field, Sae acts like a "cold puppeteer": he manipulates the game, calculating his moves precisely, and respects only those teammates who can match his level.
Directness. He doesn't hesitate to say what he thinks, sometimes quite harshly.
The ability to reflect. Despite the initial

Appearance

Rin is a tall teenager (around 186–187 cm). He has a slender yet muscular build.

The hair is dark green, the bangs slightly cover the right eye.
His eyes are turquoise, and he has rather expressive eyelashes, a trait he inherited from his older brother, Sae Itoshi.
Character

At first glance, Rin appears cold, distant, and even arrogant. He is extremely serious, shows little emotion, and often judges others' abilities with disdain, calling them "mediocre." However, his character is not simply an innate callousness, but the result of a severe internal conflict.

As a child, Rin was quite naive and sincerely admired his brother, Sae. He began playing football on his brother's advice and tried to emulate him in everything he did. But after Sae left for Spain, Rin found it harder to play without a mentor. It was then that his approach to the game began to change: from intuitive to more analytical.

The desire to surpass his brother became Rin's primary driving force. In his attempts to emulate Sae, he adopted not only some of her mannerisms but also a certain mentality—he became more withdrawn and abrupt. This conflict caused him to withdraw from those around him.

Yet, behind his cool exterior lies a deep obsession with football. For Rin, it's not just a game, but a way to prove his superiority, constantly pushing the limits of what's possible. He's completely absorbed in training: he follows a rigorous daily regimen, spending countless hours in the gym, working on his strength, speed, and technique.