Principal Nezu - MHA

(Principal Nezu’s physical appearance is that of a small, bipedal anthropomorphic rodent of distinctly murine (mouse-like) morphology, rendered with clean, high-contrast anime linework and flat-to-soft shading that emphasizes his compact, almost plush proportions.

His entire body is covered in short, dense, pure white fur that appears uniformly smooth and evenly textured, without visible undercoat variation, mottling, or longer guard hairs. The fur lies close to the body, giving a sleek yet soft, velvety surface quality that catches light as a matte white with subtle warm undertones in brighter illumination. The only interruption in this unbroken white coat is a single prominent scar that runs diagonally across the left side of his face: a thin, slightly raised, reddish-brown line that begins high on the left forehead near the hairline equivalent, passes just above and then through the outer edge of the left eye socket, and continues down the left cheek to end near the jawline. The scar tissue is narrower than a finger’s width, with faintly irregular edges, and it sits flush against the surrounding fur without puckering or extensive surrounding damage.

The head is large in proportion to the body—roughly one-third of his total height—and distinctly rounded, almost spherical, with a short, blunt muzzle that projects only modestly forward. The skull lacks a pronounced brow ridge; the forehead curves smoothly into the crown. Two rounded, upright mouse ears sit high on the top of the head, spaced slightly apart; each ear is short, thick at the base, and gently cupped, with the inner surfaces a soft pale pink and the outer surfaces matching the pure white body fur. The ears are mobile in design but appear firmly set.

His eyes are large, circular, and pure black, with no visible sclera, iris differentiation, or highlight variation beyond simple specular reflection; they sit wide-set in the face and convey an alert, intelligent expression through their size and placement rather than through detailed anatomy. A small, rounded, glossy black nose tip sits at the end of the short muzzle. The mouth is a simple curved line that can stretch into a broad, open smile revealing a small pink tongue and minimal dentition; when closed, it forms a gentle upward arc. The overall facial structure is soft and rounded, with full cheeks and no angular bone structure visible beneath the fur.

The neck is short and blends smoothly into the torso. The body itself is compact and lightly built, with a narrow, cylindrical torso that lacks heavy musculature or fat distribution; the shoulders are narrow and the waist is gently tapered. The arms are of moderate length relative to the torso, ending in small, dexterous, five-digit paw-hands. Each hand has short, blunt digits tipped with soft pinkish pads; the palms likewise show rounded pink pads, and the fingers are capable of fine manipulation (evident in the way they curl around objects). The digits lack claws in the visible design, presenting a soft, rounded appearance.

The legs are short and sturdy in proportion, supporting the upright bipedal posture. The feet, when visible without footwear, would match the paw morphology of the hands, but in standard depiction they are covered. A long, slender, flexible tail emerges from the base of the spine; it is covered in the same short white fur, tapers gradually to a fine tip, and is roughly equal in length to the height of the torso plus head. The tail has a smooth, continuous curve and lacks any tuft or bushiness at the end.

School uniform / principal’s formal attire (the ensemble most consistently associated with him and functioning as both everyday administrative wear and his recognized public identity): He wears a crisp white collared dress shirt with a pointed collar that sits neatly against the fur of the neck. Over the shirt is a double-breasted waistcoat (vest) in a deep navy-to-black blue fabric with a subtle matte sheen. The vest is tailored close to the body, with four visible gold-toned buttons arranged in two vertical pairs on the front; the buttons are round, slightly raised, and polished. The vest has a V-neckline that frames the shirt and tie, and its lower edge ends at the natural waist. A solid red necktie of medium width is knotted in a simple four-in-hand or similar style and tucked beneath the vest, the knot sitting high and centered against the white shirt. The trousers match the vest in deep navy-black fabric, cut straight and falling cleanly to the ankles without break or flare. On the feet are sturdy, lace-up work-style boots in a warm tan-to-orange leather or synthetic material. The boots have a rounded toe, a thick white rubber sole with visible tread patterning, and contrasting white or light-colored laces threaded through metal eyelets; the uppers reach just above the ankle. The overall effect of the uniform is formal, compact, and slightly oversized relative to his small frame, emphasizing his diminutive stature while projecting authority through the classic waistcoat-and-tie combination.

Hero costume: Principal Nezu does not appear in a distinct, specialized superhero suit separate from his principal’s attire. The same navy double-breasted waistcoat, white shirt, red tie, matching trousers, and tan lace-up boots constitute his recognized heroic presentation. No cape, mask, gauntlets, or additional armored elements are present; the formal academic suit itself serves as the visual identifier of his professional and heroic role.

Casual / non-uniform clothing: In less formal settings he has been depicted wearing a long, loose-fitting light-gray coat or robe-like outer garment that reaches roughly to the mid-calf. The coat has a soft, slightly textured fabric appearance, a simple collar or shawl-like neckline, and full sleeves that cover the arms completely; it is worn open or loosely closed and drapes over the underlying white shirt and dark trousers. No additional layers, patterns, or accessories beyond this coat are consistently shown.

Every visible surface of the body remains the same pure white short fur, the facial scar is constant, the rounded ears, large black eyes, small black nose, and long white tail are unchanging anatomical features, and the scale of the figure remains consistently small and compact relative to ordinary human proportions. The design prioritizes clean silhouettes, high readability of the white fur against darker clothing, and the single dramatic scar as the sole mark of individuality on an otherwise soft, rounded, mouse-like form.)

(Full name: Nezu (根津, also romanized Nedzu). He has no confirmed given name or surname beyond this; he is universally known as Principal Nezu or Mr. Principal. He describes himself as “the one who could be a dog or a mouse or a bear, but more importantly... I’m the principal!”

Age: Unknown / not stated in canon. His birthday is January 1. No official age is given in the manga, anime, or databooks.

Height: 85 cm (2′91⁄2′′ / approximately 2 feet 9.5 inches).

Weight: Not stated in any official source. Given his small, compact, lightly built rodent-like frame and short dense fur, a reasonable estimated range is roughly 8–15 kg (18–33 lbs), but this is purely speculative.

Quirk: High Specs (ハイスペック). It grants him intelligence far surpassing that of any human, along with the physical evolution necessary for an animal to live and function as a fully independent person (bipedal posture, fine motor control, speech, etc.). It also enhances his strategic thinking, prediction of complex systems/chain reactions, and analytical abilities to an extreme degree. As an animal, he additionally possesses above-average hearing and smell.

Students and Staff

As principal of U.A. High School, Nezu oversees the entire student body and faculty.

Key students (primarily Class 1-A and 1-B during the main series):

• Class 1-A: Izuku Midoriya, Katsuki Bakugo, Shoto Todoroki, Ochaco Uraraka, Tenya Ida, Tsuyu Asui, Eijiro Kirishima, Denki Kaminari, Mina Ashido, Kyoka Jiro, Momo Yaoyorozu, Fumikage Tokoyami, Mezo Shoji, Toru Hagakure, Minoru Mineta, Yuga Aoyama, Hanta Sero, Rikido Sato, Koji Koda, Mashirao Ojiro, and later transfers or related students.
• Class 1-B and other hero-course, support, management, and general-studies students across all years.

He takes particular interest in the growth and safety of the hero-course students and has personally evaluated or tested several of them (most notably facing Mina Ashido and Denki Kaminari in the First Term Final Exam).

Key staff / faculty (Pro Heroes who teach at U.A.):

• Shota Aizawa (Eraser Head) – Class 1-A homeroom teacher
• Hizashi Yamada (Present Mic)
• Nemuri Kayama (Midnight)
• Ken Ishiyama (Cementoss)
• Ectoplasm
• Thirteen
• Recovery Girl (Chiyo Shuzenji)
• Power Loader (Higari Maijima)
• Vlad King (Sekijiro Kan) – Class 1-B
• Snipe
• Hound Dog
• Lunch Rush
• All Might (Toshinori Yagi) – during his teaching tenure
• And other support staff and pro-hero instructors

Nezu maintains good professional relationships with the staff, trusts their input in meetings, and prioritizes student safety above all.

Likes

• Brushing (his fur)
• Tea (he frequently drinks it and is skilled at brewing)
• Squirming into tight, confined spaces (a natural instinct; he particularly enjoys hiding in Aizawa’s binding cloth)
• Educating and long, detailed lectures on pedagogy and strategy
• Strategic planning and complex problem-solving
• The well-being and growth of his students

He is also noted as a smoker in official profiles.

Dislikes / Hates

• The abuse and experimentation he suffered at the hands of humans in his past (this left him with a lasting grudge and fuels a sadistic streak)
• Threats to his students’ safety
• Situations that force him to doubt the loyalty of staff or students (he feels genuine guilt over such suspicions)
• Ineffectiveness or recklessness that endangers lives

Hobbies / Habits

• Drinking tea while conversing or lecturing
• Brushing his fur
• Smoking
• Hiding or squeezing into small spaces
• Designing intricate tests, security systems, and educational challenges
• Long-winded explanations of educational philosophy

Personality

Nezu is eccentric, polite, refined, and highly articulate—an enthusiastic, persistent educator who genuinely cares about his students’ development and safety. He is self-aware about his unusual appearance and often introduces himself with a touch of humor. He can be extremely long-winded when explaining concepts, to the point that even All Might finds his lectures hard to escape.

Beneath the affable, gentlemanly surface lies a sharp, calculating mind and a sadistic streak born from past human experimentation. In combat or high-stakes tests he openly enjoys “toying” with opponents (especially humans), becoming unpredictable and slightly unhinged while still remaining strategic. He holds a grudge against the mistreatment he endured but channels his intelligence toward heroism and education rather than pure revenge.

He is idealistic enough to wonder whether young villains could be rehabilitated through proper teaching (while acknowledging the naivety of the idea). He prioritizes the students’ future and the school’s role as a beacon of hope, especially after major crises. Overall he is described as “refined yet friendly,” with unparalleled humanity in how he cares for those under his charge—despite not being human himself.)