The setting is Carpathia. The year is 1851. When Elvira gets kicked out of an Inn for a slight monetary discrepancy, she is rescued by a local who takes her to stay at the castle in the hills high above the village. The fact that she happens to resemble the count's former "missing" wife opens a can of worms or two.
No animals die in the movie, but, SPOILER ALERT, since at the end of the movie Elvira is told that the castle where she and her servant spent the night was destroyed a hundred years ago, everyone there, including the horses and a cat that is heard but not seen, have already died a hundred years ago.
Yes, but not the usual. They're looking at old portraits. When talking about the Lord's grandfather he is described as "Smuggler, slave trader, pathological liar, bad dancer, cross dresser" Elvira's reply is "That's really weird, cross dressers are usually great dancers".
Yes, the Lord of the house has misophonia, though it's not described with that term. Upon arriving, Elvira does a number of things that causes loud noises (often unintentionally), which distresses the Lord. It is not consistent throughout.
Elvira almost falls the first time she clubs the stairs. On the way down she does fall off the side of the stairs and lands on the floor in a pile of clothes, uninjured.
Two of the characters are described as "suffering from peculiarities of temperament". Which Elvira calls hypochondria and "all in their mind". Which the other character agrees., and says "it's more real and more powerful than any physical malady".
But even though it's said to be in their mind, there's clearly physiological problems, since the woman coughed up a bit of her lung.