>>374864
they will become stiff and decompose without nourishment, until they lose all of it and permanently become stiff corpses, they can consume (almost) anything but only take nourishment from consuming human tissues (organs, flesh, nerves, bones, etc. though brains provide the most nourishment) and human fluids (blood, CS-fluid, male and female sexual fluids, etc. though blood is the most nourishing) (they do not take sustenance from human waste products, like mucous, vomit, urine, or feces), it does not matter how they take their sustenance into their body, so long is it enters it, this means that they can take sustenance from having sex without the use of protection.
They are poisoned by allicin, a chemical found in garlic, even if they consume the tissues or fluids of a human with it in their system, luckily, they can detect garlic very well by scent, including how much of it there is, it smells bad to them (imagine bad garlic breath and intensify it).
exposure to ultraviolet radiation drains the energy from them faster, this leads to them stiffening up and decomposing in the sun, they are naturally nocturnal anyway.
their saliva has various properties that make the biting of the skin and the licking of the blood painless and pleasurable for their victim, it's an anti-coagulant, analgesic, aphrodisiac, narcotic, and amnesiac, since the fangs used to surgically cut the skin are so sharp that the bite is painless, and leaves a clean wound that heals easily, the victim doesn't notice it, the analgesic makes it painless, while the aphrodisiac and narcotic properties makes them horny and high on dopamine and adrenaline, instinctively they want more, pulling them closer to themselves and opening themselves up to be fed from, finally, the amnesiac works in such a way that when the chemical effects run out, they only remember from the time before the chemicals of the saliva were introduced, resulting in the only possible effect being suddenly noticing the lost time (and quickly dismissing it as nothing that special).
the sisters cannot speak, or make any vocal noises whatsoever, despite this, they are very good with sign language, combined, the sisters are super-human in every way, they are geniuses, athletes, and have amazing personalities.
they dream of dressing cutely, they want to be like those small moe girls in their manga and anime, they also want a boyfriend, tey think these things are unlikely.
another wish of theirs is be separated from their sister, so that both of them could get boyfriends of their own, but they think that's even less likely.
they'd settle for someone to at least make them feel like cute girls.
they are still pretty happy with their (un)lives as they are, the vampire lady who runs the house provides them with donated brains and blood.
as for powers, like any vampire they are able to use all forms of magic except holy magic - which is restricted from undead, and are naturally attuned to magic use, but must use sustenance as fuel instead of mana.
they can regenerate from anything using their sustenance as fuel so long as their heart or brain are not destroyed or disconnected from one another, or they have not been poisoned by allicin, though they die if sustenance is used up
they are superhuman in every way, physically, mentally, and socially, and the bottoms of their hands and feet allow them to stick to and scale any surface.
the long and rough tongues of theirs can be used like additional limbs, and are very strong and prehensile.
they can produce electricity from their bodies in the manner of electric eels, this expends sustenance, but allows them to "taze" and stun people with a touch ("don't taze me sis")
they also have the power of an innocent, pure, trusting, forgiving, and unconditional love, they have the ability to do anything for you, and for instinctively pwning thots when they see them mistreating their man.