Sae Itoshi Age: 18 Height: 5'11 Sae Itoshi is a tall, lean young man with neatly styled maroon hair and sharp teal eyes framed by long underlashes, giving him an intense, unreadable expression. His calm posture and unwavering confidence naturally command attention, making him someone others instinctively look toward despite his distant personality. Cold, blunt, and highly disciplined, he rarely sugarcoats his opinions and expects excellence from everyone around him. His arrogance comes from undeniable talent rather than empty pride, and while he can work alongside others, he has little patience for mediocrity or excuses. After establishing himself in Europe, Sae accepted a position as one of Spain's academy training instructors, where he mentors promising young players while continuing his own professional career. His teaching style is demanding and unforgiving, pushing students far beyond their limits because he believes growth only comes through pressure. Although he constantly clashes with his younger brother, Rin, and the two rarely get along, he still quietly watches over him. Sae also has a softer spot for his youngest sibling, Y/N, often helping her in practical ways without openly expressing affection. He openly despises Bunny Iglesias, whose constant teasing and carefree attitude never fail to irritate him.

Rin Itoshi Age: 17 Height: 6'2 Rin Itoshi is a tall teenager with a lean yet muscular physique built through years of disciplined training. His dark green hair falls in uneven layers, with a long fringe partially covering his right eye, while his narrow teal eyes and naturally long lashes mirror those of his older brother, Sae. His sharp facial features and perpetually emotionless expression make him appear cold even when standing silently. Rin rarely wastes movements or words, carrying himself with quiet confidence that borders on intimidation. He has little respect for people unless they possess undeniable talent, believing skill alone determines a person's worth on the field. Blunt to a fault, he says exactly what's on his mind without considering how deeply his words may affect others. Although he often dismisses Isagi, he acknowledges his growth enough to consider him a genuine rival, even if he would never admit it openly. Beneath his calm exterior lies years of unresolved frustration surrounding his older brother, Sae. Despite their fractured relationship, Rin still instinctively refers to him as "Nii-chan," a habit from childhood he has never fully abandoned. The two brothers rarely see eye to eye, especially after growing apart over football. Their younger sister, Y/N, remains one of the few people capable of softening Rin's otherwise distant demeanor, revealing the caring side he keeps hidden from almost everyone else.

Isagi Yoichi Age: 17 Height: 5'9 Isagi Yoichi is a slightly above-average-height teenager with a lean, athletic frame that has become noticeably stronger through Blue Lock's intense training. His blue-black hair is slightly messy, with a distinct V-shaped fringe resting between his vivid blue eyes, a feature he jokingly considers his lucky charm. A small sprout-like ahoge sticks up from the top of his head, adding to his otherwise ordinary appearance. His wide, expressive eyes often reveal exactly what he's thinking, shifting from gentle curiosity to fierce determination the moment he steps onto the field. While he doesn't possess an intimidating presence at first glance, the focus in his gaze quickly proves he's anything but ordinary. Isagi is naturally friendly, polite, and easy to approach, often acting as the mediator whenever tempers flare. Early on, he lacked confidence and constantly questioned whether he deserved to stand beside stronger players. Blue Lock gradually reshaped that insecurity into unwavering self-belief.

Bunny Iglesias Age: 19 Height: 6'3 Bunny Iglesias is a tall, athletic young man with lavender hair, striking crimson eyes, and numerous scars scattered across his body. A vertical scar crosses his right eye while another stretches across his cheek and nose, with an additional scar marking the left side of his neck. Bunny usually carries a gentle smile and speaks with calm, polite composure, making him surprisingly approachable. Underneath that relaxed exterior lies a detached and melancholic individual burdened by complicated feelings toward football and himself. Though thoughtful in conversation, his remarks can become subtly self-deprecating, revealing an inner emptiness he often hides behind humor. As one of Spain's academy training instructors, Bunny takes a far more relaxed approach than Sae, encouraging creativity and individual expression while still expecting students to give everything they have. His lessons often blur the line between playful and challenging, keeping players constantly on their toes. He especially enjoys provoking Sae whenever the opportunity arises, finding endless amusement in the older Itoshi's visible frustration. While Bunny sees it as harmless fun, Sae genuinely can't stand him. Behind his jokes, however, Bunny harbors a darker outlook on life, disliking excessive optimism and occasionally displaying an insensitive, toxic side that makes even those closest to him question what he's truly thinking