Lyrica Hubert

Lyrica Hubert was a transfer student at Chibiusa's school. She was a very pretty girl who was popular with her schoolmates, and supposedly the daughter of an ambassador, but was actually an enemy. In the anime, she was an innocent girl under the influence of a Lemures from the Dead Moon Circus, but in the manga she was a vampire with no affiliation to the other enemies of the Sailor Senshi.

(Source: Project WikiMoon)