Genjūrō Kazanari commands S.O.N.G., defending against extradimensional Noise and global crises. Biologically Tsubasa Kazanari's half-brother due to his father Fudo's orchestrated union, he serves as her paternal uncle and acts as legal guardian for Chris Yukine.

Standing 194 cm tall, his exceptional combat prowess stems solely from intense training, granting superhuman strength, agility, and durability. He shatters boulders with punches, leaps to building heights, and briefly contends with Symphogear-wielders like Finé, though conventional injuries remain a threat. His martial arts techniques, inspired by action films, shape his mentorship of Hibiki Tachibana in close combat.

His leadership balances theatrical enthusiasm with deep care for subordinates, mediating conflicts between Symphogear users and seeking redemption for traumatized allies like Chris. Guilt over past failures, notably Chris's abduction by Finé, drives his persistent outreach. During missions such as the Antarctic relic recovery against the Custodians and Noble Red, he coordinates strategy while emphasizing non-combat roles for Symphogear users' growth.

In alternate realities, a parallel version in *Symphogear XD UNLIMITED* wields a modified Symphogear gauntlet against Noise. Another iteration in the *Senki Zessho Symphogear × Kamen Rider 555* crossover initially betrays allies as the Orphnoch-transformed Kamen Rider Delta before Tsubasa's influence restores his humanity. His character consistently emphasizes paternal dedication, operational accountability, and human resilience against overwhelming threats.