Imagine if Appletree Duo were the Starting Vampires but they're sort of the inverse of Scott and Owen
Centuries in the past, there lived a wandering peasant named Martyn who stumbles upon a castle away from a village that seems apprehensive. It was there he encountered the Vampire Lord of this land and was forcibly turned against his will to carry out their evil deeds lest he starves.
He's nothing but a peasant after all, with no family or friends to speak of. He's easily replaceable.
So Martyn forces his head down and obeys for as long as he could before he remembers the folktales whispered in winds and written in books, finding a good time to strike before he stakes the person who cursed him with this life.
But... ah....... He was stronger like this wasn't he? He was no longer the weak man, the foolish man, the useless man. He can use his own claws now to take what is his now.
This castle, this village, it was his to claim when he had slain the Vampire Lord and rightfully taken his place.
They're under new management now and well.... If there's one thing he learned in his unlife, you either pay with your death or with something else. And you'll rather sacrifice cattle than be it yourself right?
Of course, like Scott Goldsmith, he's eventually put to a magical rest and buried in his own coffin and crypt.
But when he wakes? He's not foolish enough to grant anyone this gift of unimaginable strength and immortality. After all, vampires can easily kill other vampires, he would not want his claim to be threatened. But humans? Humans don't stand a chance against him.
A few centuries after Martyn was put to rest, Apo was still sent into the military and forced to battle. It was there that she was turned into a vampire when they scouted too far ahead and the military used their newfound vampirism to their advantage and made her their own weapon.
Apo got sick of fighting and killing and all the blood in their hands and they run away with Cherri into Oakhurst to lay low and live the rest of their lives as peacefully as they can.
Cherri helps Apo get the meat and blood she needs to stay satiated without arousing suspecion on her partner. But the village grew wary of Cherri because of her frequent requests and while Apo was out of town to buy Cherri supplies for her hobbies, Cherri was burned at the stake for being incorrectly thought of as the vampire.
Seeing the brutal murder of their partner once they returned, Apo wrecked havoc in Oakhurst in her grief before burying themself fruitlessly to rejoin Cherri on the other side, not knowing that getting staked by another person could've permanently killed them so she could truly reunite with her beloved Cherri in the afterlife.
She values and cares about humanity so much. Yet why do humans keep killing each other for no reason? Why do they let fear and hatred overtake them?
....well, if humanity is so willing to throw away the lives of others in a futile attempt to lengthen their own mortality, why not give it to them? Why not give them the immortality they so crave so they can see how fruitless hurting other people is?
You can't kill others if both of you are immortal. And they deserve to feel what it's like to be forced to live forever while everyone else they love rots around them.
They won't be alone in this grief.