So I spoiled myself and read your convo with Oliver. A kitsune, huh?
They're basically just like they were when they were alive, so it depends on the person. Some people handle being dead better than others.
Both? I think it just feels really cold for normal people. To me, it's kinda like swallowing a glass of ice water real fast. It spreads all through me and makes me feel dizzy, and then the spirit usually tries to take control of my body.