Undohkai

From Sailor Moon Wiki

Undohkai is a Heart Snatcher sent by Mimet to steal Pure Hearts. She has a giant crab shell on her back (as she was created from a shell) and can shoot ribbons that die people together. She appeared in Episode 28 of Sailor Moon S.

Mimet took Undohkai with her to extract the Pure Heart of an athlete named Shawn Hayes. After sucking out his Pure Heart and eating it, Undohkai attempted to run, but ran into Hotaru, who uses her power to blast her backwards. She was protected by her shell, but Sailor Mini Moon used Pink Sugar Heart Attack on her, and Sailor Moon transformed into Super Sailor Moon and destroyed her with Rainbow Moon Heart Ache, leaving only the shell and Shawn's Pure Heart.