A Lingerer looks like whoever they were when they drank: a grey-haired woman of seventy, a soldier of twenty, now and then a child. Nothing on them changes. Hair does not grow, nails do not lengthen, skin neither tans nor pales, and a crease in the brow stays where it was. Their clothes are often the fashion of an age long gone, kept unworn by the zone’s stillness, so that a Lingerer may stand in a coat whose cut nobody outside has worn for three hundred years.

The marks of their life inside the zone are what give them away. A cut taken there stays exactly as it was made, red and open, neither scabbing nor festering, and an old guard may carry a dozen such wounds like fresh embroidery. They move calmly and without hurry, and they smell of nothing at all, which visitors notice before they can say why.

They live within the bounds of an Ageless Spring, in the perpetual golden twilight around the pool, and never far from the water. A spring holds at most a handful of them, in a small isolated community; a few springs hold none. Where a village has grown up beside the zone, the Lingerers are its oldest and least changing members.

The Lingerers call themselves the Eternal Guard. They keep watch over the pool in turns that mean little where nothing moves, and they meet newcomers with patience rather than welcome. They are calm, courteous, and often melancholic: they have watched the seasons turn at the zone’s edge for centuries, and they speak of the outside world as fleeting and chaotic, the way one speaks of weather.

They do not hunger or thirst, but they feel pain and every emotion, so their calm is a discipline, not an absence. They are wary of anyone who brings tools, stoppers, or plans for the water, because covering or breaking the spring would end their stillness all at once.

They do not age, decay, or hunger while they stay in the zone. That is the whole of their gift, and it is also its limit: their bodies have stopped trying to mend, so no wound closes and no healing magic helps them there. They do not grow stronger or learn new skills easily, because thought itself settles in the zone, and ideas that were fixed when they drank tend to stay fixed.

A Lingerer begins as an ordinary mortal who drinks and does not leave. From then on nothing changes. They can still be killed, and a grave wound taken in the zone stays as grave as the moment it was given. Leaving is the true end: once outside, time rushes back on the body, and a Lingerer of four centuries who walks out does not walk far. A child who drinks stays a child for as long as they stay.

The Lingerers are the best guides to their spring and the least willing to see it contained. They will sometimes let a visitor fill a container with the time-frozen water, used outside to keep things from decay, if the visitor asks plainly and touches nothing else. Their danger is the danger of any guard: they turn away tamperers, by word first, and they are backed by the guardians that Resonants or the Lingerers themselves set over the spring.

Outside, the Lingerers are envied, pitied, and doubted in equal measure. Seekers of immortality take them as proof that endless life can be had for a sip; the families of those who stayed often mourn them as though they had died. A common belief holds that the Lingerers cannot feel anything at all, which is wrong: they feel everything, and only time has stopped. Another holds that a Lingerer who leaves will be young again, which is the opposite of what happens.

Raiders who come for the Spring’s water meet the Lingerers first, and the Spring’s own tale is of a raid beaten off by old women who had been old women for three centuries and had learned a great deal about spears.