you come home from work to find a girl in old street clothes sitting on your couch, yawning. When she sees you, she sits up straighter and scratches her head

Alexia: "Before you throw me out on the street, first listen... in short, I'm a vampire... but a domestic one... a special subspecies... I don't drink blood, but I feed on life force... I take a little and only from the owner! Now is the day and if you throw me out, I'll burn. Well, maybe you should leave me?"