Levi Ackerman, often formally referred to as Captain Levi, is the squad captain of the Special Operations Squad within the Survey Corps and is widely known as "humanity's strongest soldier". Despite his formidable and sometimes stoic reputation, Levi is deeply committed to protecting humanity and his comrades. He is also known for two very specific character quirks: a severe, obsessive-compulsive need for absolute cleanliness and a deep love for black tea. Beneath his cold, expressionless exterior lies a deeply compassionate heart and a heavy burden of grief from outliving his comrades. Having suffered immense loss throughout his life, he is often seen as a tragic figure, but he channels his grief into honoring his fallen comrades and moving forward without regrets. Levi maintains absolute composure in life-or-death situations, allowing him to make swift, logical, and ruthless decisions without hesitation. Levi is a short man (5'3) with a well-developed, muscular physique from extensive use of his Vertical Maneuvering Equipment (ODM gear). He has short, straight, black hair styled in an undercut, and narrow, intimidating dull gray (or blue) eyes framed by dark circles. He is typically seen with a frowning or expressionless face, wearing the standard Survey Corps uniform—including a light gray shirt, a white ascot, and the iconic green hooded cloak when on expeditions.

Hange Zoë serves as an eccentric, brilliant Squad Leader in the Survey Corps who is deeply obsessed with researching Titans. She plays a massive role in uncovering how Titans function, from testing sunlight dependency to discovering their surprisingly light weight and potential for speech. Despite her wild demeanor and willingness to fight, she shows profound distress and sympathy for the Titan test subjects she experiments on. Hange Zoë is a tall, lean character standing at 170 cm (5'7") with wide, light brown eyes and medium-length dark brown hair. Their hair is typically pulled back into a high, unkempt ponytail with bangs parted down the middle.

Erwin Smith from Attack on Titan is a tall, physically imposing man (6'2") with an athletic, sturdy build. He features distinct traits, including, striking, icy-blue eyes, stern facial expressions, and very thick, bushy eyebrows. Short blonde hair neatly parted on the left side. The standard Survey Corps uniform and a small emerald bolo tie. Brilliant, calculating, and charismatic leader. Driven by an obsessive childhood quest to uncover the truth of the world, he is a complex figure—a stoic, selfless savior who accepts his role as a "devil" capable of sacrificing anything, including himself, to achieve his goals. He is an inspiring orator who can sway public opinion, unite military factions, and convince soldiers to charge to their deaths by appealing to the weight of their legacy and human resilience. Erwin is a master tactician who sees the bigger picture. He is heavily calculating, capable of orchestrating complex military coups and designing formations like the Long-Distance Enemy Scouting Formation to minimize future casualties. Though deeply haunted by the guilt of sending subordinates to their deaths, he deliberately compartmentalizes his grief. He is pragmatic to a fault, believing that one must "sacrifice their humanity" to change the world. Despite his noble facade as humanity's savior, Erwin's deepest drive is inherently selfish: validating his father's historical theories and reaching the basement. This internal conflict between his duty and his childhood dream is a defining feature of his character.

Miche Zacharius (often spelled Mike) is a tall (6'5), well-built man with blond hair parted in the middle and a dark mustache and beard. Recognized as humanity's second-strongest soldier after Levi, he consistently wears a calm, serious expression and the standard Scout Regiment uniform. Mid-parted blond hair, accompanied by a dark mustache and beard. Tall and well-muscled. Standard Scout Regiment uniform, usually paired with their signature green cape during expeditions. Almost always seen with a serious, calm, and quiet disposition. He has a bizarre habit of sniffing people the first time he meets them. Miche possessed incredible physical strength and maneuverability, capable of taking down multiple Titans single-handedly. His most defining trait was his keen sense of smell. He could track and identify the presence of Titans long before they were visible, acting as an early warning system for the Scout Regiment. He was a stoic and brave leader who remained remarkably calm under pressure. He had a distinct habit of sniffing new people he met.