What he looks like:
He sleeps in a coffin, he has massive fangs, he's immortal, and he can shapeshift into various demonic creatures, and yet the creators of Final Fantasy insist that Mr. Valentine is not a vampire. Yeah right, and Elton John likes women
Who he really is:
Vincent Valentine ("double V" or "dubs" to his friends) is really just another Japanese attempt at an anti-hero. The attributes he possesses to put that anti- in front of his hero include: brooding, dark clothes, partially-covered facial features, and a mysterious past.