Agartha’s Wounds and Defenses
5 Centimeters per SecondThis thread follows Agartha’s history of exploitation and isolation as its people struggle between protecting their world and making choices within it.
increasing
Bearing strength in each event
decreasing
The Ancient Gatekeepers

The Ancient Gatekeepers
Gods withdraw
Morisaki’s accounts describe Quetzal Coatls as guides who withdrew underground after humanity outgrew their role.
Gatekeepers remained behind, linking Agartha’s history to creatures that protect its passages.
A fragile inheritance
The old knowledge survives in fragments, customs, and stories rather than a thriving unified civilization.
That inherited world is already vulnerable before the surface travelers arrive.
Plunder from the Surface

Plunder from the Surface
Wealth and invasion
The elder explains that surface rulers repeatedly entered Agartha to seize knowledge and wealth.
Their demands brought war and destruction to cities that had once been more magnificent than those aboveground.
A defensive response
The survivors used claves to close the gates and prevent further intrusion.
The policy protects a wounded people, but it also turns historical trauma into an inherited suspicion of every outsider.
A Declining Underground World

A Declining Underground World
Remnants of prosperity
Asuna and Morisaki encounter grand ruins and abandoned settlements, evidence of a civilization that once extended far beyond its remaining villages.
The landscape is beautiful, but its emptiness makes decline visible rather than abstract.
Isolation’s cost
The living communities they meet distrust Topsiders and debate whether protecting Agartha requires rejecting all contact.
The same isolation that prevented new invasions has also left people with few ways to renew their society.
A Missionary Boundary

A Missionary Boundary
Duty against contact
The matriarch condemns Shin for allowing Topsiders into Agartha and orders him to recover their clavis.
Her concern grows from historical violence, but the order leaves little space for judging individuals by their actions.
Friction between villages
Amaurot’s soldiers also treat the travelers as a threat and try to stop them by force.
Agartha’s defenses therefore protect real collective memory while reproducing the hostility that keeps its communities divided.
A Future Without a Fixed Home

A Future Without a Fixed Home
The cost of dissent
Shin protects Asuna and Morisaki despite his community’s orders, and the soldiers tell him that he has forfeited his place.
His defiance makes the old conflict personal, separating his choice from the institutions that shaped him.
An unsettled possibility
At the ending, Shin remains in Agartha with Morisaki rather than returning to Canaan.
His path does not resolve the underground world’s isolation, but it suggests that inherited divisions can be crossed through chosen loyalty.
Long before the present journey
During the centuries before Agartha sealed its gates
At the time Asuna and Morisaki cross into Agartha
When Shin receives his assignment from Canaan
After Shin rejects the Amaurot soldiers