For mobility, the person in the last RP with blood abilities she called it Plasma shift, which basically was she turned into blood and could move around faster then of course she normally would of with just walking or running. Water or Blood I'm fine with both. I'm not entirely rejecting the vampire thing, just that if you use it well the person would have to be one of those people who think they are a vampire but really not since they don't exist. After all there are those people in society today, it's a big cult thing or something like that.