I don't think it really matters. Greek Mythology is a lot of things, but consistent isn't one of them. Certain stories can have different meanings based one where you read it. For example, some versions of Persephone's kidnapping say Hades forced her to come to the Underworld and tricked her into eating the pomegranate and in other versions, Persephone came willingly just to get away from Demeter.
Our views on Banshees are different as well.
From the stories I grew up being told about them they weren’t evil, but they weren’t good either, their job was to end family lines when it was their time.
Kind of like grim reapers?
I consider them similar to dullahans, but they were specifically tied into one family.
I’ve never heard the omens of death take on them before, which is a new one for me.
The particular region I’m from, we have stories of the banshee being a faerie who sings songs of the dead. Her ( she is typically a female, though males are possible) song sends its listeners to the afterlife.
She’s not a ghost, nor is she vengeful. She simply is.
Banshees are very interesting, though I personally prefer Dullahans.
Roman: Hikari, don’t let your insecurity issues, like, color your idea of what’s going on out there. We’re fine.
Hikari : What? I’m not insecure, you’re insecure.
Roman: Spoken like a truly secure person.