would Hel be associated with ghosts? and for spirits in general (not just the human variety), which god(s) are associated with them?
yea sure, I’d associate Hel with ghosts. As for spirits in general, though… well… I mean the argument can be made that the gods themselves are spirits so… that’s kind of a hard thing to define, and if you’re just generalising them all then I would argue that all the gods have at least some association with spirits.
I can say with confidence that the Elves are associated with Freyr, Valkyries have been associated with Odin and Freyja for sure… Einherjar are human spirits but I wouldn’t classify them as ghosts and they’re clearly associated with Odin. But as for Dwarves, Landvaettir, Husvaettir, Vatnavaettir, etc. I don’t know..? honestly it could depend on the individual spirit and/or the place they inhabit, like with Vatnavaettir it could be Njord, it could be Ran, could be neither – they could be self employed lol…
Then there’s my personal belief that all the gods rule over a place of afterlife, and so the souls that go to them I would consider to be spirits specifically in association with that god. So yea, I’ve gotta say all the gods have an association with spirits one way or another, but I guess most prominently Hel, Freyr, Odin, Freyja, and Frigga.