Souya Togo commands the 13th Aviation Corps, leading the elite Sonic Diver squadron with the rank of lieutenant colonel. His reputation stems from his past as a combat pilot in the first WORM war, where extraordinary skill earned him the legendary call sign "Black Knight." During that conflict, he sacrificed his flying career, sustaining permanent hand injuries while shielding fellow pilot Jin Hizaki from an attack.

Forced from the cockpit, Togo now shapes the next generation as a commander and trainer. He operates from the naval destroyer Koryu and the Oppama Testing Facility. Despite his senior rank, operational command of the Sonic Diver program rests with Lieutenant Rei Hizuki, placing Togo under her authority within this specific unit—an arrangement he accepts, though not without professional friction.

Brown hair, grey eyes, and a goatee define his features. Togo consistently eschews standard uniforms for a leather flight jacket bearing a winged skull emblem, a plain white shirt, and blue jeans. This choice fosters an initial impression of informality for some, belying his true military discipline. His leadership is rigorously demanding during training and missions, emphasizing skill and discipline to prepare young pilots for the brutal realities of WORM combat. Beneath this stern exterior lies a deep concern for their safety. He treats all personnel with consistent fairness, expecting obedience through respect rather than authoritarian force.

Fishing provides his primary escape, a regular ritual for quiet reflection. He approaches it with remarkable patience, undisturbed by consistent lack of success. His mentorship, particularly with pilot Eika Ichijo, challenges them to build resilience and self-reliance, leveraging his hard-won combat experience to ensure their survival and effectiveness. His personal sacrifices and operational history remain the foundation of his methods.