So... Can vampires feed on supernatural creatures, or mortals only?
For example, can a BCV feed off the blood of a RCV? Can a WCV feed off of a Nixie that mistakingly used her incite emotion to attract him, not knowing what he was?
This isn't just a philosophical question, actually. I have a WCV character being played in my game, and a pack of Nixies, not knowing what this particular PC is, but wanting to separate them, is planning on using glamour to disguise themselves as college girls, get them separated, and use her incite emotion to try and lure the WCV vampire to a watery death.
Problem is, of course, their incite emotion is based off of allure, beguiling, attraction, etc. I'm not sure how to adjudicate what would happen at that point.
However, it also makes a good philosophical question for the pack at large. Then again, maybe each vampire type has a different answer depending on the prey as well....