@DeliciousElfEars:
The only book which comes to my mind is a German children's book: "Der kleine Vampir" by Angela Sommer-Bodenburg. It is known as "My Friend the Vampire" or "The Little Vampire" in English. It is the first title of a whole series, in fact, though I only have read the first book when I was a child. The eponymous vampire boy also has a little sister, which would be the loli vampire so to say. But keep in mind that it is a children's book and thus harmless as compared to horror novels or fantasy novels aimed for older readers. I am sure you are looking for something rather different but this is the best I can tell you.
Here the link to the wikipedia article:
https://en.wikipedia.org/wiki/Der_kleine_Vampir