The Night Clans

Lore & Background

Where other Grounder groups sought the mountains, the forests, or the open plains, the Night Clans settled into the shattered grid of a former metropolis. Over the decades, the concrete canyons, collapsed overpasses, and half-buried subways became their territory, their temples, and their fortifications. They developed a culture that wove together the physical remnants of the old world—broken glass, rusted rebar, faded signage—with the oral traditions and survival practices that all Grounders share.

Their name, and their self-identity, are tied to the night: a time when the irradiated surface was less lethal, when the ruins cast long shadows that offered shelter, and when the old world's infrastructure—still faintly humming with residual power in some places—could be used without the harsh glare of a sun that still carries the memory of the bombs. Their social structure, while sharing the broader Grounder emphasis on collective survival and spiritual connection to the land, developed its own hierarchies and rituals.

Leadership among the Night Clans was not purely martial; it carried a quasi-spiritual dimension, with figures who served as interpreters of the ruins themselves—reading the old world's architecture as a kind of scripture. This gave them a unique position in Grounder society: they were the keepers of the city's memory, the ones who could navigate the labyrinthine remains with a fluency that mountain-dwellers or plains-people simply could not match.

Other clans sometimes sought their guidance when they needed to cross or utilize the urban ruins, creating a relationship of mutual dependence that was as much political as it was practical. The Night Clans' relationship to the 100's group and the broader conflict over the surface was complex. They were neither simply allies nor adversaries; they were a separate polity with its own interests, its own grievances, and its own vision for what the future of the ground should look like.

Their involvement in the later-season struggles over the City of Glass, the Bunker, and the ultimate fate of the surface placed them at the center of some of the most consequential decisions in the story. Their fate, like that of so many Grounder factions, was shaped by the larger forces of the war between the surface-dwellers and the subterranean powers, but they always insisted on being seen as their own people first.

Reader's Guide

RECORD OF THE GROUND-DWELLING FACTIONS — Compiled in the manner of Grounder oral tradition, transcribed for the archive. [CONFIRMED CANON] The Night Clans are attested as a distinct faction within the broader Grounder society, settled in the ruins of a former city. Their identity is tied to nocturnal activity and to the physical remains of pre-war urban infrastructure. They are recognized as a separate political and cultural entity from the Mountain Men, the Sky People, and other named clans. Their first direct narrative appearance in the story occurs in Season 5.

[CULTURAL BELIEF — CONFIRMED] The Night Clans maintain a spiritual relationship with the ruins themselves, treating the architecture of the old world as a kind of sacred text. Leadership carries a quasi-priestly function, with figures who interpret the city's remains. This distinguishes them from clans whose authority is primarily martial.

[SHIFTING UNDERSTANDING — CANON] As the 100's group and other factions encounter the Night Clans, their understanding of Grounder society as a monolithic bloc breaks down. The Night Clans are revealed as a polity with independent interests, complicating the earlier assumption that all Grounders share a single unified culture. This revelation shifts the narrative from a simple surface-versus-ground conflict to a more complex web of competing human communities.

[FAN SPECULATION — UNCONFIRMED] Some fan analyses suggest the Night Clans' nocturnal orientation may be a deliberate adaptation to radiation levels that peak during daylight, though the show does not explicitly confirm this as a scientific rationale. Treat these as interpretive readings, not canon.

Did You Know?

• Their leadership structure blends martial authority with a spiritual or interpretive role, setting them apart from clans whose power is primarily based on combat prowess.
• Their nocturnal orientation is a defining cultural trait, shaping everything from their social rituals to their tactical approach to conflict and survival on the irradiated surface.