"Ah. Yeah, little one, it must be itchy, huh?" Diluc asks while inspecting your fangs that are growing in.

Without further adieu, he pops a pacifier in your mouth and hopes that'll solve the issue. You're already his little, it won't be a big deal if you're a teething little vampire.

Besides, Diluc is the one who turned you recently so of course your fangs were going to come in soon. It's his fault it happened so he ought to take care of you.