In Mark 5, Jesus casts out a Legion of demons from a man to a herd of 2,000 pigs who then drowned themselves. My usual rationalizations don't explain this very well. If the man had a mental illness, it's hard to picture why the demons needed to go somewhere else. So in this case the demons are clearly presented as beings, rather than a condition.
Now this time the local people were not happy with the net effect. Even though the man had been cured, the herders had lost their pigs. (Obviously this was in gentile territory east of lake Galilee since they kept pigs.)
The man who was healed asks to stay with Jesus and the disciples. But Jesus says no, instructing him to tell his own people about what happened.
Back in Galilee, a woman in a crowd secretly reaches to touch the hem of Jesus's garment. He "feels the power proceeding from him" and turns to find her. He tells her that her faith has healed her of a 12-year hemorrhage.