Tanguin serves as the primary antagonist within its narrative. This massive mechanical entity appears as either a giant metal fortress or a monstrous mobile fortress, wielding considerable destructive power. It directly engages in combat, demonstrating enough resilience to endure assaults before withdrawing when critically damaged.

Driven by a systematic objective, Tanguin abducts women from settlements, specifically targeting the Han tribe village. These kidnappings threaten the village’s survival by removing reproductive-aged females, including newborn girls. The abductions support an elderly individual’s goal to establish a new society populated by captured women.

Operationally, Tanguin uses mountain terrain for concealment, retreating to this hidden lair after battle damage. In certain references, the entity bears the alternate name "Penguin," likely reflecting regional linguistic variations. Tanguin’s narrative arc concludes when the fortress sustains critical damage during the climactic confrontation, though its precise destruction remains unspecified.