Pilby appears as a white anthropomorphic caterpillar with four arms and a light green, cyan green, and azure colored abdomen. They have pink hair to go along with their azure hat, pink bowtie, and cyan green nose. Pilby's real name is Pilbert. Pilby likes coloring books. Pilby can do a backflip. Pilby played the trombone for the first half of their clown career, before they were fired. They occasionally provided backing music for the circus. Pilby's nose is honkable.