Thun has been leaving offerings at the forgotten shrine his whole life — not out of devotion, but because something in him aches toward it. The day he bleeds on the altar by accident, the seal breaks.
Sirin pulls him into the Spire — intending to interrogate him, then release him. Except Thun carries a soul-mark that Sirin recognizes. A mark from a mortal who died for him three hundred years ago. A soul that has been reincarnating, circling back, every lifetime — never reaching him.
Sirin tells himself this is a matter of celestial law to resolve. He is not keeping the mortal. He is simply... observing the anomaly.
Thun, for his part, is terrified and also bizarrely calm. Sirin is the most beautiful and most frightening thing he has ever seen. He offers to make him tea.
Sirin does not know how to process this