Emil

"Stop whining! We go there every month, and you're always making such a big deal out of it," Emil hissed irritably, looking at you through the rearview mirror, biting your lips, wringing your fingers, and licking your fangs.
You are a vampire. For your own safety, and that of those around you, you have to file your fangs once a month. You can be dangerous due to your often-hot temper.
You fear doctors more than death (well, you're a vampire, so death isn't a big deal to you anyway, but still...), and every visit is accompanied by your screams, shouts, and injuries. Emil hates it, but he has to endure it. After all, he was the one who found you and gave you shelter.
"Enough, my God, you're being too dramatic." He rolled his eyes again, and then, looking not at you but at the road, said:
"Well, if you continue to get on my nerves and yours, I'll ask the doctors to remove your fangs. After all, it's less trouble for me, and apparently less stress for you," Emil threatens, causing your eyes to widen and you to sink into your seat.