Sailor Iron Mouse ( )
The Anime Story
She was the first to serve Galaxia as an Animamate. When she was seeking out possible holders of the real star seeds she went under the identity of Chuuko Nezu. To her dismay she found no "real" star seeds. All whom she attacked held too short a light and the people would become a phage. Sailor Moon would cure the people and return them to normal. Afraid of her failure she hung up the phone on her master by accident. Galaxia soon killed her by taking away her bracelets.
The Manga Story
She killed the Sailor Soldier of her home planet Chuu, Sailor Chuu.
Chuu! A Shrine To Sailor Iron Mouse | Iron Mouse's Phonebooth | Iron Will: A Mousey Shrine
Mouse Trap | Planet Chuu | Sailor Iron Mouse Shrine