Since the day phase is over I would like to say this: The vampires have three possible kills for DAY ONE: one by lynching, one by vampire kill, and one by vampire assassination. I am not sure if they would take this sacrifice, but they could have easily killed Akido (if he really is the Guardian) by using the Vampire of Hypnosis and possibly sacrificing one of they're own. By using this method they could have three possible kills but they would have to sacrifice not being able to kill the next night. This, however, is only effective only if Akido is telling the truth. I, also, believe that the Vampire of Hypnosis is only truly effective for the beginning of a game such as this one and for tie-breakers, if the vampires choose to use the ability.
EDIT: sorry quira, it wasn't me who said this ;_;
On another note, I think Jakko's a vampire. He seems very quick to try and confuse everyone as badly as possible. He knew full well that the whole Guardian thing was a technicality, but he argued it to the end in a bid to set everyone off their bearings.
Deus Ibi Est.