Jugai, an adept of Nanto Koshū Ken within the Nanto Seiken tradition, trained alongside Shin under Master Fūgen, rivaling his fellow disciple in martial prowess. Consumed by grief after bandits slaughtered his wife and child, he plunged into madness, mustering a ruthless army to seize control of the lawless wastes. His forces stormed Gesso City, a stronghold built on enslaved labor, where he clashed violently with Kenshirō and met his demise.

Mortally wounded, Jugai thrust Siska’s remote detonator—once used to subjugate Gesso’s populace—into Kenshirō’s hands, vowing to witness the warrior’s destiny unravel from the depths of hell.

Forged by tragedy and honed into a peerless combatant, Jugai embodies the destructive spiral of vengeance, his downfall a testament to the consequences of unchecked rage and ambition.