Sanzu River
In "The Sealing Symbol," an injured Dayu collapses on Master Xandred stating that she played it for Deker and that it was the end of her sadness. Dayu stated that she wasn't truly a Nighlok. Master Xandred puts Dayu out of her misery as he absorbs Dayu's human half to serve as his defense against the Sealing Symbol and keep him from drying out. All left of her was her kimono, which is thrown to the Sanzu River by Master Xandred. Dayu was presumably reunited with Deker in the afterlife.