A vengeful former Imperial Army lieutenant and onmyoji who seeks to destroy Tokyo by awakening the ancient spirit of Taira no Masakado through forbidden magic and seismic manipulation.
Izumi serves as a literary chronicler who frames Kato as an enduring, cyclical threat to Tokyo.
Nishimura's scientific innovations directly oppose Kato's onmyodo magic during the metro construction arc.
Kato forcibly takes Yukari to exploit her bloodline for his destructive rituals.
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