"Not one of the vampires or demons must be left alive on this island"
Mr. hypocrisy, please sit the fuck down.
I mean, yeah, kill the spider thing, but seriously, mr. "I was a vampire from way back when vampires lived peacefully with humans and personally vouched that a group of peaceful vampires should be slain" does not get a say on which vampires should be killed.
Man.... Author could just say the water was infected somehow, no need to put a dead body RIGHT BY THE LADY DRINKING THE WATER, makes it look like she wasn't all there in the mental faculty department.