Julie was a Rainbow Monster that was said to have come from deep within the forest that surrounded the outskirts of Home. She lived with her family in a cave but sought out a life of her own and moved away.
Recent evidence has revealed that Julie's family consisted of three siblings who were also rainbow monsters, but with greatly differing color palettes. Their names were Bea, Franny, and Jonesy, but they do not appear to have lived in Home alongside her.