The way the Keeper always told it, she stayed a halla forever, and though Andruil still loved her, they could never be together. When we have to bury our dead, [ Which he should know, since he'll have to be witness to such things, ] we sacrifice a halla in Andruil's name so Ghilan'nain's spirit can guide our souls to the Beyond, and afterwards be reunited with her beloved.

[ Athessa shrugs, gesturing with her pen. ]

There's a lot left to interpretation, though.