Reath (Japanese: ブレスBreath) is a Miror B.Peon. In Pokémon Colosseum, she is never seen without her partner Ferma. They are first seen in a cinema sequence with Miror B., who exits and leaves Pyrite Bldg in their guard. Wes arrives at the building and defeats Reath, snagging her shadowRemoraid in the process; he then defeats Ferma and snags her Mantine, saving Silva, who Reath and Ferma had been holding captive.
Reath and Ferma show up again in Pyrite Town's jail, Folly and Trudly having moved to separate cells nearby. Wes gets the Jail Key and steals the Elevator Key from Reath, who is lying on the cell's bed, asleep.
Once Wes has beaten Evice, all four prisoners escape. Reath and Ferma both flee to the room in Pyrite Cave where Miror B. is fought. They battle with Wes and then remain there.
Their actual status as members of Cipher is foggy; they may not know the entire plan, but only what Miror B. tells them.