The name is derived from a silly conversation this girl had with her cousins over her and her sister's dream of owning a cupcake shop. A cupcakery, of course. Named Cuppycakes, no less. So the girl's silly cousins decided they all should have silly cupcake-inspired names like Yummy Crumbs, Queen Frostine, and Captain Cuddle-cups and the girl happily settled on Princess Truffle Fluff. Grouchy cousin Duncan, who, in Princess' mind, is perpetually 6-years-old (he's 15), hates his name (Glitter Boo Duncan) almost as much as he hates his silly older girl cousins, but they don't care. A family fortune in cupcakery awaits, surely.
So why did the girl eye poor Babs in the parking lot and immediately think of starting a blog? I don't know, maybe she's that arrogant, that she thinks people actually want to know about the times that nature literally craps all over her life. (Oh, you better believe the bird poop was just the icing on the cupcake of the dumb, unnecessary events of her day.) Or maybe, she sees herself in a sparking hot pink tutu, a wand, and a nametag that says "Princess Truffle Fluff" and this is her delusion of choice when she see Babs all covered in crap, OKAY PEOPLE??