Chapter 1: The Efficient Minstrel (link goes to AO3)
Who would be better suited to deal with a restless spirit than one who has already experienced the afterlife? Alas, Glorfindel finds that obstinate Elves do not become more docile in death. And if he wants Lindir to return order to the Last Homely House and love to the life of Lord Elrond, Glorfindel has to grasp the nettle - among other plants.
Notes:
This tale was originally scheduled for Hallowe'en 2020, so I'm a little late. But goosebumps work well at 30°.
This is a ghost story, and ghosts are, by their very nature, individuals who are not dwelling among the living anymore. I still don't think this needs a "major character death" warning, though.