I make a lot of OCs for different fandoms. Right now I have 3 for Rosario+Vampire...
Karmel Shuzen: Moka's half witch cousin. She's Koko's age.
Toffee Shuzen: Karmel's little sister. She's too young to go to school with her big sister.
Yoru Morioka: Gin's little sister. A tough girl who HATES girly things.

I made Sakura Sendo, Yukari's older sis. She's an "A" class witch much more powerful.

I have a Rosario+Vampire character although he is not related to any of the character's in any way. His name is Vincent McGee, forgive the terrible last name. He is American he enrolls to the school, after finding out he is a monster. The monster type I just made up, he is a Mona monster. Incredible race of monster's that went extinct centuries ago before the Anime or manga's time line. But there was a legend saying that a new one would be born that would rebuild the race. That one is Vincent. He's enemy's with Tskune and the other's at first, but after talking shit to Tskune Mizore step's in to make him stop of course they end up battling then Moka come's in but even Moka had a tough battle with Vincent. But she win's soon enough then he vow's to defeat Moka and become's friend's with them to observe Moka's fighting style, and figure out a way to win. Well that's mine character and the story of they meet and such. Please let me know what you think.

No I don't.

@GowPro55: that's an interesting concept, i like the idea of an extinct race being reborn, and that hes observing Moka's fight style so he can win someday...(he wont because Yukari's a boss)

My character is still in progress. His name is Hikaru, but I can't decide if I want to make him into a half-human/vampire or a mage.