emerges that Iron Mouse killed Sailor Chū, the Guardian from her home planet Chū, taking her star-seed so that Iron Mouse could be a Sailor Guardian. In the anime adaptation, she goes by the human pseudonym . This pseudonym has a name expressing word-play: in Japanese, Chūko and Nezu are each perfectly acceptable names; however, "chū" is the sound made by mice, and nezu is short for nezumi, which means "mouse". She exhibits a personality both childlike and intense; she usually chooses famous or impressive people as her victims, seems to enjoy her work, and is openly fearful of Galaxia. She is also known to travel in a phone booth similar to a TARDIS. She is also afraid of cats. After failing to steal the star seeds, she becomes the first one killed by Galaxia. In the anime series, her voice actress is Eriko Hara in Japanese. In English, she is voiced by Katie Leigh. In the musicals, Chie Maruyama, Aki Kudo and Shion Aoki portray Iron Mouse. Sailor Aluminium Siren becomes the second of the Sailor Animamates to appear. The Greek word Seiren in her name means the same as the English Siren and often appears romanized as such. Aluminum Siren first appears in Act 44 on the roof of Jūban High School and attacks Usagi and Seiya with Galactica Tsunami. She succeeds in stealing the starseeds of Sailor Mercury and Sailor Jupiter, killing them instantly; then Sailor Star Maker and Sailor Star Fighter kill her. According to the Materials Collection, she sings and writes ballads as a hobby. In the anime adaptation, Aluminium Siren makes her first appearance in episode 182. Her human pseudonym is , which may be a pun on "puppet," "mermaid," "makeup" and "child spirit." She is very polite, ditzy and oblivious when off-duty, and is always eating or feeling hungry; once engaged in battle, however, she drops her flaws and becomes completely ruthless. Aluminium Siren works together with Sailor Lead Crow, who reveals that they once competed for the position of Number One Animamate. She eventually discovers Sailor Moon's identity and nearly succeeds in killing her, but the Inner Guardians and the Sailor Starlights stopped her. Despite learning their identities, as well as finding a strong star seed, Aluminium Seiren is killed by Galaxia for failing to kill Sailor Moon. She is voiced by Kikuko Inoue in Japanese and by Faye Mata in English.