Hell Ant was the fourth Cardian that Ail and An sent to drain energy for the Makaiju . She possessed tentacles that extend from her hair and her back to drain energy from people. She appeared in Episode 4 of Sailor Moon R "Usagi's Crisis! The Tiara Doesn't Work!".
In the virtual reality game, Hell Ant attacked the people and drained their energy. She also targeted Usagi's father, Kenji and her brother, Shingo . When Usagi transformed into Sailor Moon and threw her tiara, it seemed to have lost all its power. Fortunately, the Moonlight Knight arrived (ending Usagi's suspicion that he was Mamoru, because Mamoru and the Moonlight Knight were there at the same time) and cut off the tentacles on her head, but she attacked him with the tentacles on her back, until they were burned off by Sailor Mars. Sailor Jupiter and Sailor Venus subsequently combined their attacks to destroy Hell Ant.
In the English dub, they address her as a bee, due to her abdomen resembling a bee abdomen.