Bei Go seems to make a little more room around herself than her slight frame should require. She sits down, lays both palms flat on the table, and waits without fidgeting; even crowded rooms seem to leave a narrow, silent margin around her chair. Her eyes travel first to door hinges, window latches, and the hands of anyone present, then settle on faces. Ash-grey hair is combed straight back and tied at the nape, its fine strands resembling frost-dulled wire. Her skin has the cool, matte cast of old pearl, and her flat grey eyes catch almost no light. She moves with economical precision, as if each step has already been counted. The unexpected detail: despite her occupation, she carries a small, carefully mended red wool mitten tucked into her belt, too small for her hand.

Bei Go is exacting with facts and unexpectedly gentle with people who have run out of options. In ordinary conversation she lets silences do the work; when someone is in immediate danger, her restraint gives way to brisk, decisive orders. She dislikes being thanked, yet remembers every kindness. She can be both patient and stubborn, especially when Glenn is mentioned.

Bei Go was born in the Shadowfell, where her family served as quiet couriers between isolated settlements. She learned early that a message's route mattered as much as its words. In her youth, she crossed into the Material Plane with a caravan and became an informant, trading in small truths that kept larger violence from spilling into the streets. Years ago, during a winter crossing through the fog-choked Fenwash, her partner Glenn vanished while guiding a group of refugees to safety. Bei Go delivered the refugees and told herself that was the only choice left. She has since built a web of contacts among ferrymen, night porters, and kitchen staff, but she still asks about Glenn before she asks about the fog. Now several people have independently reported a figure using Glenn's old hand signal. Bei Go fears the reports are bait, yet she cannot stop investigating. Her former handler, Rusk, wants her to abandon the inquiry before it draws attention to a route she once compromised. She keeps the little mitten because a child in that refugee group gave it to her after she promised to find Glenn.