I don't know about any of you who may read this, but I want to know about Moka's family. Judging from Moka-sama(when I say -sama I ALWAYS mean inner Moka) and her sister's that we have been introduced to, Kokoa and Karua, their family life MUST be a little...different. The one I'm dieing to know about is the last sister, the eldest. The sisters seem to grow extremely more powerful from the youngest to oldest. I'm practically jumping out of my seat to know the last. I don't know if anyone for sure knows her name or what she looks like but I'm been reading fanfictions about R+V and found one I really like. It's called The Mighty Vampire Aono by Lord of the Land of Fire. link
(!WARNING! That story is rated 'M' for mature. It's not for children to read. It contains not only lemon but lemonade.)
In that story the last sister is a major character and is name Ria. I'm still not positive about what she looks like from the author's description but this story is really great and gives a whole new way to think about the relationship between Moka-sama and Tsukune.