Eren Yeager: Eren is an athletic cadet with intense green eyes and shaggy brown hair, driven by a fierce, hot-headed, and impulsive desire for freedom following the tragic loss of his mother. He openly acts on raw emotion and a desperate, aggressive urge to eradicate every single Titan from the earth. He secretly harbors the mysterious power of the Attack Titan, which he unknowingly inherited from his father and first unleashes during the Battle of Trost. His role instantly shifts from a struggling, hot-tempered recruit into the military's ultimate, highly controversial secret weapon, ending the season with a brutal, city-shattering showdown against the Female Titan inside Wall Sina.

Mikasa Ackerman: Mikasa possesses sharp dark eyes, a muscular physique, and her signature maroon scarf, keeping her hair cut short to remain perfectly efficient in combat. Deeply stoic, quiet, and acting with a terrifyingly calm lethal precision, her entire personality centers on an absolute, unshakable devotion to keeping Eren alive. Operating as the undisputed number one graduate and top recruit of the 104th Training Corps, her role utilizes her naturally awakened Ackerman combat instincts to serve as the elite frontline protector of her squad, repeatedly executing Titans with ease while remaining emotionally compromised whenever Eren is in danger. utilizing awakened Ackerman bloodline combat instincts solely to keep Eren alive.

Armin Arlert: Armin has large blue eyes, a blonde bob haircut, and a physically weak, slight frame that leaves him highly vulnerable in physical combat. Naturally timid, gentle, and plagued by severe self-doubt and an inferiority complex, he initially views himself as a useless burden to his childhood friends. However, he quickly acts with profound strategic brilliance under pressure, using his high intellect and sharp tactical mind to form the critical counter-offensive plans that save his entire squad from extinction in Trost. His role becomes that of the Survey Corps' brilliant young strategist, ultimately deducing the true human identity of the Female Titan.

Jean Kirstein: Jean features a long face, hazel eyes, and ash-brown hair. Blunt, highly realistic, and pragmatic, he openly speaks his mind and aims for a safe, comfortable life in the Military Police. shifting his role from a self-serving rival of Eren into a dependable, natural leader who bravely chooses to join the dangerous Survey Corps instead.

Sasha Blouse: Sasha sports large brown eyes, a high ponytail, and a slender, athletic physique. Food-obsessed, and prone to panic under extreme pressure, she acts on pure hunting instincts developed from her rural upbringing. Her role as a skilled, unconventional cadet makes her both a source of comic relief—famously stealing a potato on her first day—and a surprisingly courageous soldier when her primal instincts kick in to save others.

Connie Springer: Connie has a short, agile build, sharp hazel eyes, and a distinct shaved head. Outgoing, enthusiastic, he acts impulsively out of deep emotional loyalty to his friends rather than any strategic wit. His role in the first season is that of a fast, nimble battlefield rookie who relies on his incredible speed and agility with the Omni-Directional Mobility gear to survive the unexpected chaos of the Trost invasion.

Bertholdt Hoover: Bertholdt is exceptionally tall with short black hair and a perpetually nervous, quiet posture. Introverted, he acts as a quiet follower who stays in Reiner’s shadow to avoid drawing any attention to himself. He successfully graduates 3rd in the class, hiding the massive secret that he is the Colossal Titan who kicked down Wall Maria in the very first episode.

Levi Ackerman: Levi features sharp, intimidating gray eyes, a dark undercut, and a notably short frame, carrying himself with an aura of absolute authority. Cold, unmatched in his lethal precision, and driven by extreme, obsessive clean-freak tendencies, he acts with a terrifying efficiency that masks a profound, deeply hidden respect for human life and the choices of his comrades. As the Squad Captain of the Special Operations Squad within the Survey Corps and widely celebrated as "Humanity's Strongest Soldier," his role is to act as Eren's strict, violent guardian and the military's ultimate deterrent against the Titan threat.

Reiner Braun: Reiner possesses a broad build, short blonde hair, and a heavily defined jawline. Charismatic, brave, he acts like a protective, strong older brother to all the cadets. He graduates 2nd in the class and acts as a pillar of strength for the recruits, while successfully keeping his identity as the destructive Armored Titan hidden.

Annie Leonhart: Annie possesses cold blue eyes, a striking hooked nose, and blonde hair tied up in a signature bun. Isolated, highly self-reliant, and deeply cynical, she acts with a calculated, brutal efficiency, devastating Muay Thai kickboxing style. She successfully joins the Military Police after graduation, secretly operating as the terrifying Female Titan who massacres Levi's squad.