Naito Mudano cuts a striking figure with his tall, lean frame, sharp brown eyes, and black hair swept left. Two vertical black stripes mark his right cheek, contrasting against his usual black formalwear—sometimes accented with white pinstripes. Rollerblades bolster his movement, granting lethal efficiency in combat scenarios. A partially visible black-ink tattoo coils along his arm, hinting at an expansive full-body tapestry updated with each fallen comrade—a living memorial to those lost.

His quiet intensity masks a razor-sharp mind intolerant of wasted effort, with approval granted sparingly—only the protagonist has ever earned admission through his direct endorsement. Though outwardly calculating and reserved, he secretly prioritizes student survival above all, offering understated support during crises while maintaining professional detachment.

A veteran of the Oni Corporation’s elite Combat Unit, Naito wields superhuman strength, agility, and reflexes—shattering trees barehanded, parrying barrages blindfolded, and dismantling enemy squads alone. Tactical brilliance transforms surroundings into weapons; his modified umbrella fires projectiles, deploys smoke screens, and unfolds into defensive nets mid-combat. The Blood Eclipse Release fuels his deadliest arts: spectral archers materialize through *Torrential Rebirth*, crimson storms drown battlefields via *Autumn Cloudburst*, and twin blood dragons collide in the *Quenching Rain of the Twin Dragons’ Tears*. At his peak, he invokes *Okami-no-Kami*—a crimson deity commanding tsunamis of liquid devastation.

As an academy instructor, he forges warriors through merciless drills and tactical mastery. The protagonist receives particular attention—his uncharacteristic investment blending harsh lessons with covert safeguarding, driven by their shared heritage’s lethal legacy. This approach cultivates iron-willed survivors capable of enduring any threat.