No,but mortals can become vampires
Typically dead is dead and there is no going back. However I have seen a couple of movies with such a possibility in it.
The first requires a full body blood transfusion (After Dark)
The second merely requires a gradual re-acquaintance with real food. (Love Bites)
The Cullens.
They are not real.
fae (faeries), werewolves, warlock and vampires
Vampires are fiction. You can not become a vampire.
by becoming vampires
NO, because Vampires are not real
None. Vampires are fictional
No. Vampires stay the same forever.
can vampires become real
None, vampires are fictional characters.
No, vampires are fictional, or mythical, creatures. There are those that like to cosplay a vampiric lifestyle, but they remain regular mortal people.
The Cullens are a family of 'vegetarian vampires', which means they don't drink human blood; only animal blood.Other than that, most vampires in the Twilight series drink the blod of mortal humans, and consider tham a snack.