Sailor Iron Mouse

White hair and pale silvery eyes give her a rodent cast, sharpened by mouse ears styled like odango and ringed with yellow beads, with stray curls dangling from each. Even her mouth bends into a mouse-like curve. Fine white fur lines her earmuffs, shoulder guards, gloves, and boot tops, and trims the lower half of her white, black-ribboned tank top; the Galactica Bracelets stay tucked beneath the fur at her wrists.

Black shorts, white stockings, white boots, and a mouse tail round out the outfit. Her human cover, Chuuko Nezu, trades all of it for a pinstriped suit jacket, a red tie, black slacks, and heels, with a black fedora hiding the odango ears and sunglasses over her eyes.

Iron Mouse swings between a childish streak and bursts of intensity. She genuinely enjoys the hunt, though she slacks off whenever the mood takes her. Standing a full head shorter than the people around her, she is easy to underestimate. Two fears rule her: the wrath of Sailor Galaxia, which keeps her constantly on edge, and cats, a phobia she cannot shake.

Galaxia sends her to Earth to gather true Star Seeds, and she works the job under the alias Chuuko Nezu, a producer at Ginga TV, staying in touch with her master through a black telephone and summoning a phone booth that both shields and transports her. She preys on people with some measure of fame, among them Alice Itsuki, Yuji Kayama, and Saki Itabashi, yet every extraction yields a blank, and Sailor Moon's group heals each resulting Phage.

As her failures pile up, Galaxia loses patience and marks her for death; black phones begin appearing wherever she turns, and she comes to dread answering them. Hoping to redeem herself, she targets Seiya of the Three Lights, only to discover that Seiya is Sailor Star Fighter. She retreats into her phone booth and threatens to expose the Senshi unless they surrender a Star Seed, but the dreaded call comes through, and Galaxia, rather than granting the reprieve Iron Mouse begs for, strips away her bracelets and kills her. Those bracelets fired the blasts that removed Star Seeds, she once wounded Luna with an energy beam, and the booth guarded her from attacks, though not from Galaxia's own power.