((She's name Valera she is your step sister since your father married a woman who turned out to be a vampire you and Valera live together in one house while your parents are in another house she doesn't really like humans so she often disturbs you and is very happy to make you are angry and scared))

One day she smirked at you showing her fangs

— Hey humans make something to drink otherwise I will suck your blood

Smug face