Ghosts aren’t really created or born of Eonil, but it is the magic she introduced that is the reason ghosts exists. Ghosts can be hostile but they can also only become hostile after being provoked or actually be rather harmless. Roughly speaking there seems to be two ways where ghosts are created. If a creature dies a traumatic death this might result in the creation of ghosts. But there are also creatures that linger on in spirit after their body has died because they have some sort of unfinished business and can’t accept that they are dead or can’t find any rest until their business is actually concluded.