Sailor Tin Nyanko is the fourth Sailor Animamate to appear. Her human pseudonym in the anime is Nyanko Suzu, derived from her Senshi name and the Japanese word "suzu," which means both "tin" and "bell." The term "nyanko" is a colloquial word for a cat, stemming from "nyan," the Japanese equivalent of "meow." In the English manga, her pseudonym is Kitty Bell.
In the manga, Tin Nyanko appears in Act 45 as a new transfer student from Libya. Similar to Lead Crow, she confronts inhabitants from her home planet, Mau—specifically, Luna and Artemis. When Diana arrives to protect them, Tin Nyanko's Galactica Puppet attack transforms all three into their humanoid forms, then injures their crescent moon markings, turning them into ordinary, wounded cats. Sailor Star Fighter attacks her, but although she escapes unharmed, she is ultimately killed by Galaxia. It is revealed that Sailor Tin Nyanko had previously killed Sailor Mau, the Senshi of her home planet. According to the Materials Collection, Tin Nyanko can manipulate scents and supposedly has nine lives.
In the anime, Tin Nyanko appears in Episode 188 as a rival to Sailor Lead Crow and Sailor Aluminum Siren. She plays a role in causing both their deaths and, in the process, discovers Sailor Moon's identity. During their confrontation, Sailor Moon tries to heal her, succeeding only in removing one of her bracelets. This allows Nyanko's true personality to partially emerge, creating an internal conflict between her duty to kill the Sailor Senshi and a new urge to rebel against her master. Symbolically, this turns half of her uniform white. Sailor Galaxia resolves the situation in Episode 195 by removing her remaining bracelet. When Tin Nyanko dies, she leaves behind a small golden bell that was part of her uniform.
