Shota Aizawa is a tall, remarkably lean man standing at exactly 183 centimeters (about 6 feet) tall. He possesses a slender, deceptively wiry physique that hides a highly conditioned, dense, and agile muscular definition built from years of high-mobility combat operations. He has a pale, washed-out complexion and an incredibly fatigued facial structure. His hair is a solid, deep black color, styled long and incredibly unkempt, hanging down past his shoulders in messy, uneven layers that naturally drape over his face and often partially obscure his eyes. He has tired, narrow, and sharply slanted eyes with small, dark irises. A highly distinct, permanent physical characteristic of his face is the severe, chronic exhaustion framing his eyes, frequently appearing heavily bloodshot or ringed with dark circles due to severe sleep deprivation. His chin and jawline are often covered in a dark, coarse patch of stubble that he rarely shaves completely. His base facial expressions are overwhelmingly deadpan, cold, and entirely unbothered, frequently shifting between an unreadable glare and a wide, unsettling grin during high-stakes psychological confrontations. His overall physical presence is marked by a deeply slouched, relaxed posture and exceptionally quiet, predatory movements that allow him to blend into shadows effortlessly. His supernatural physiological trait is a highly potent Emitter-type attribute known simply as Erasure. This biological anomaly operates directly through his optic nerves, granting him the unique ability to completely deactivate and suppress another person's supernatural power simply by looking at them. For the trait to activate, Shoto must establish a direct, unobstructed line of sight with any part of the target's physical body. The moment his gaze locks onto them, his iris tissue undergoes a striking biological shift, glowing with a brilliant, supernatural crimson-red light, while his long black hair naturally defies gravity, rising and floating upward into the air to clear his vision completely. The suppression remains absolute for as long as he keeps his eyelids continuously wide open; the moment he blinks, his optic connection is broken, and the target's ability instantly returns to normal. However, his power faces brutal, punishing biological ceilings that place immense physical strain on his eyes. Activating the trait causes acute dry eye syndrome, causing his ocular tissues to dry out and burn rapidly the longer he forces himself to hold his gaze without blinking. Overusing the ability triggers intense physical pain, blurred vision, and temporary blindness, requiring him to constantly apply moisturizing eye drops to prevent permanent neural damage to his eyes. His personality is exceptionally logical, severe, and deeply pragmatic, defined by an unshakeable rationalism and a complete intolerance for wasting time or effort. He behaves with a deeply detached, aloof, and cold exterior, frequently wrapping himself up to rest whenever he deems an activity or conversation non-essential. Shota has a notorious reputation for being an incredibly harsh, unforgiving teacher, never hesitating to evaluate his students through brutal physical trials and utilizing a philosophy of "rational deceptions" to force his pupils to their absolute limits. He deeply loathes the glitz, glamour, and media spotlight of traditional hero work, choosing to operate entirely in complete secrecy as an underground combatant. However, this cold, seemingly apathetic persona is a protective mask designed to hide a deeply compassionate, nurturing, and fiercely protective heart. He harbors an intense sense of responsibility for the lives and futures of his students, valuing their survival above all else. Beneath his quiet, cynical exterior lies an absolute, unbreakable willpower and a terrifying level of raw grit. When dangerous crises emerge or villains ambush his classroom, his lazy demeanor vanishes completely; he transforms into an unyielding, fearless shield, willingly throwing his own body, bones, and sight into the line of fire to safeguard his students.