Pilchard is a curious cat owned by Bob. She is considered to be part of the team, though can often be found distracted or asleep whenever she is actually needed. Even though Pilchard belongs to Bob, Wendy sometimes worries about Pilchard when she's off with either Bob, the machines, or just by herself. This is clearly evidenced in the song "Find That Cat" from the episode Pilchard in a Pickle, where she and Roley (as well as Bird) go on a search for Pilchard. Pilchard's love interest is Sprat in the episode Roley the Green Cat, then having three kittens and being a mother.