Would magic that repels Creepy Things such as the Patronus charm work on the smiledogs spectral dogs?

Also, asking again on here since it's even more relevant -- would Ariadne's shadow form still have that "canines are your mortal enemy" thing? And either way, would they be able to tap into her fears if she's in that form? What about the fears of regular animals (pets, mounts, summoned creatures)?

Does it matter which crypt the bones are buried in? (Maybe the undead was a Seelie champion who'd be really upset about being buried in Caer Scima, idk.)