God exists. Jesus Christ exists. Angels, which are God’s ministering spirits, exist. But that is all
1Co 8:4-6 Therefore, as to the eating of food offered to idols, we know that “an idol has no real existence,” and that “there is no God but one.” (5) For although there may be so-called gods in heaven or on earth–as indeed there are many “gods” and many “lords”– (6) yet for us there is one God, the Father, from whom are all things and for whom we exist, and one Lord, Jesus Christ, through whom are all things and through whom we exist.
Vampires, demons and other supposed supernatural malevolent beings have no real existence.