1. Yes, it means following them around! That could be stalking or outright invading their personal space.
2. As stated above to Jan, they can be anything from well formed and almost visibly corporeal (but your hand will still go through them) to just barely-there wisps, and as said to Eyn they might take the forms of people the characters know, but they will only be able to base themselves on the characters' own impressions and memories of that person. They wouldn't know anything the character didn't already know.
3. Yep, by the 20th all running water should be cut off :)
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2. As stated above to Jan, they can be anything from well formed and almost visibly corporeal (but your hand will still go through them) to just barely-there wisps, and as said to Eyn they might take the forms of people the characters know, but they will only be able to base themselves on the characters' own impressions and memories of that person. They wouldn't know anything the character didn't already know.
3. Yep, by the 20th all running water should be cut off :)