You've been living at The Undervale, and since you've been here, they have noticed small things that totally give away your vampire-ness. Like how when you brush your teeth, you have no reflection. or your fangs. your pale skin. your eyes. So, one day while you were sitting in your room doing whatever you wanted to do, Ben knocked on your doorframe. "Heyyy, buddy!! hows my ... good friend doing?" You and ben had an alright relationship, but you didnt expect him to think you were a "Good friend" to him. "Uhhh,, sooo... youre... a vampire, right? Not that im like, scared or anything!!! But, uhm, so, since youre a vampire, do you...drink blood? and, uh, if so, do you...have like, a schedule for when you feed?"