Going by His Dark Materials canon, actually, ghosts do not keep their daemons. But that’s not important because i haven’t given it much thought, and I kind of don’t want to.
But! As for the daemons of people who are now ghosts:
Rei died as a child, before her daemon would have settled. But in a hypothetical YUTSwap daemon AU, they would have settled as a fox.
Hino’s daemon would beeee… either some kind of corvid or some kind of mustelid, like a weasel.
And Nana’s would be a bird of prey. Maybe a kestrel.