Chibi Vampire, originally released in Japan as Karin (Japanese: かりん), is a Japanese manga series written and illustrated by Yuna Kagesaki. The story is about an unusual vampire girl, who instead of drinking blood must inject it into others because she produces too much.
The only vampire bloodline confirmed as true vampires in the Hellsing series is that of Alucard and his offspring. The most notable initial ability of true vampires is their ability to transform their opposite-gender virgin victims into their offspring.
Rosario Vampire is a typical male targeted anime filled with comedy, ecchi, and action. Typical school comedy with typical jokes associated with high school comedies. The "special" twist for this show would be that this school happens to be a school for monsters.