If you do some research around the sanctuary in chendinhal, you find out that vincent is VERY succeptible to garlic. Somewhere you find that, eventhough all vampires aren't really keen of garlic, vincent has a very heavy reaction to it. (he even blaims marie antoinette of trying to poison him by putting in his food somewhere)
so my question is, is there a way to kill him with garlic? does reverse pickpocketing it on him make him weaker? or is this just something to fill up the game?
(i did some test myself, but never found out anything)