Gutterglass are the people between the bricks, the watchful residents of rooftops, service tunnels, crowded markets, and forgotten courtyards. They know which baker leaves out yesterday's bread, which magistrate owns a secret door, and which alley should never be entered after rain. A Gutterglass adventurer carries the city with them: its bargains, warnings, ghosts, and impossible routes. They may be a courier, investigator, fixer, exile, street priest, architect, or simply someone who wants to see what lies beyond the skyline.

Gutterglass are a varied urban ancestry united by reflective eyes, flexible hands, and a faint translucence beneath the skin. Their irises may resemble smoked glass, polished amber, rain-dark stone, or colored bottle shards. Many have fine, almost invisible lines across their cheeks, shoulders, or forearms that catch lamplight like hairline cracks. These markings are harmless and often brighten with emotion. Their ears, noses, teeth, and body shapes vary widely among family lines. Some are compact and nimble, while others are broad-shouldered and imposing. All Gutterglass possess an uncanny ability to remain visually present without seeming memorable, a talent cultivated through generations of city life.

Gutterglass society is organized around blocks, crews, and mutual-aid circles rather than bloodlines alone. Every person is expected to know a trade, a route, and a way to help in an emergency. Children learn city lore through games that resemble hide-and-seek, scavenger hunts, and elaborate roleplay. Hospitality is generous but conditional: guests receive food, shelter, and warnings, while hosts expect honesty about danger. The ancestry has a strong tradition of oral history, coded graffiti, rooftop festivals, and public storytelling. Reputation matters, but so does the ability to change one's reputation through useful action.

Gutterglass religion is practical, local, and full of thresholds. They honor household spirits, vanished founders, sainted workers, guardian beasts, and the accumulated memory of neighborhoods. Shrines are often hidden behind loose bricks or built into public infrastructure. Their priests bless doors, bridges, wells, contracts, and departures. Gutterglass communities tend toward neutrality because survival demands compromise, though individual members may be fiercely altruistic, scrupulously lawful, or delightfully criminal.

Gutterglass communities grow wherever cities leave neglected spaces: beneath elevated roads, above market halls, inside old aqueducts, and along the hidden faces of civic monuments. Their homes are narrow, vertical, and densely interconnected, with ladders behind false walls, rope bridges between chimneys, and communal rooms built around warm vents. They favor colored glass, polished metal, hanging gardens, and movable partitions. A Gutterglass home is rarely entered through its obvious door.

Gutterglass are often treated as useful but untrustworthy by settled folk, who rely on their couriers, guides, repairers, and informants while pretending not to need them. They have complex relationships with goblin-kin communities, usually sharing trade networks and underground routes while disagreeing over who has the stronger claim to a particular district. Elven-like peoples often admire Gutterglass craftsmanship but misunderstand their communal obligations. Dwarf-like artisans frequently respect their structural knowledge, especially when a Gutterglass can identify a dangerous foundation by sound alone. Among themselves, Gutterglass judge people less by birth than by whether they leave a place safer than they found it.