Vampir (ヴァンピル, Vanpiru) is a Cardian who works for Ail and An. She is an evil monster who sucks energy from people, particularly young girls. She appeared in Episode 1 of Sailor Moon R (Episode 41 if R is to be considered Season 2 of the Sailor Moon anime), and is the first Cardian that Ail and An sent to gather energy for the Makaiju.
Luna and Artemis attempted to stop Vampir themselves and rather than revive the Sailor Senshi, but she was too powerful for them to stop as she was draining Naru's energy. Usagi came over at that time and Luna had no choice but to restore her memories of being Sailor Moon. Sailor Moon's energy was nearly drained by Vampir, but Luna stopped her by biting her arm, giving Sailor Moon the opportunity she needed to destroy Vampir with Moon Tiara Action.
Vampir's name is derived from the word "vampire".