Gutterglass folk are the city-born keepers of overlooked places. They know which baker leaves out yesterday's bread, which rooftop ladder has a missing rung, and which alley becomes dangerous when the bells ring twice. Their eyes gleam like bottle glass in the dark, but nothing about them is supernatural. They survive through patience, mutual aid, and an intimate understanding of how crowded streets conceal both cruelty and kindness.

Gutterglass folk are compact or rangy humanoids with a remarkable range of builds, from wiry climbers to broad-shouldered porters. Their skin may be umber, ash-gray, olive, copper, cream, or nearly black, often marked by faint translucent patches along the knuckles, ears, or cheekbones. Their eyes catch lamplight in jewel-like colors, and many possess slightly pointed ears, flexible toes, or unusually nimble fingers. Hair is commonly worn short, braided close to the scalp, or threaded with bits of colored glass. Their clothing is practical and layered, with hidden pockets, reinforced hems, and tokens indicating family, trade, or neighborhood affiliation.

Gutterglass society is organized around households, work crews, neighborhood circles, and reciprocal obligations rather than formal clans. Children are raised by extended networks, and a person may belong simultaneously to a family, a trade, a district, and a circle of sworn friends. Hospitality is practical rather than ceremonial: a guest receives food, a place to sleep, and warnings about local dangers. Their most respected virtues are reliability, discretion, cleverness, and knowing when to ask for help. Disputes are often settled through public testimony, exchanged favors, or the careful reconstruction of who failed to maintain an obligation.

Their spiritual traditions center on hearths, crossroads, thresholds, and remembered names. Some honor household ancestors, while others leave offerings to personified streets, bridges, rivers, or city gates. Most communities value a balance of personal freedom and mutual obligation, making neutral and good alignments common, though ambitious guild leaders, evasive smugglers, and zealous civic reformers can be found among them.

Gutterglass neighborhoods grow wherever stone, timber, and human traffic create shelter: beneath bridges, behind market halls, along old walls, and in the upper stories of crowded tenements. Their architecture favors narrow entrances, shared courtyards, hidden storage, rooftop walkways, and windows fitted with colored panes that identify family homes from a distance. Public spaces are designed for many uses at once, with stairwells that become meeting halls, wells that serve as message boards, and kitchens built for communal meals.

Gutterglass folk are found in nearly every large settlement and are often mistaken for a single tightly knit people, though their families may have lived apart for generations. They usually build strong relationships with laborers, merchants, messengers, and other residents who rely on practical cooperation. Nobles and authorities may regard them as troublesome witnesses or useful informants. Gutterglass communities are wary of armies, private police, and landlords who alter neighborhoods without consulting the people who live there.