Prime Universe
According to Sylvester Shoebill, the Prime Universe was so named because “[its] representative was first in line at the registration office when the Council of Frogs put together their little Doomsday Book”.
It included a version of the Earth, inhabited by a number of coexisting sapient species, including humans as well as several anthropomorphic animal species including shoebills, (PROSE: The Grand Multiverse Hotel) cockatoos, chickens, and ducks. (PROSE: The Interdimensional Tavern')
History
A version of Atlantis existed on the Prime Earth in ancient times, and was believed to have possessed advanced technology. (PROSE: The Strangely-Colored Secret Societies)
Victorian London was home to versions of Sherlock Holmes and his associates, as well as to Sexton Blake. (PROSE: The Time of the Toymaker)
In the 20th century, a malevolent organisation called the First Horde sought to rediscover the ruins of Atlantis and use its technological secrets to take over the world. The Strangely-Colored Secret Societies came into existence as offshoots of the First Horde. (PROSE: The Strangely-Colored Secret Societies)
In 1960, a scientist from the Prime Universe invented the Clockwork Cherubs, who, in the form of the Crew of the Copper-Colored Cupids, later relocated to a pocket universe of their own, the Cupid Homeworld. (PROSE: The Grand Multiverse Hotel)
In 2019, an interdimensional Rift appeared in the headquarters of the Faction of the Fooling Fish (one of the Strangely-Colored Secret Societies), linking the Cupid Homeworld and the Prime Universe directly. (PROSE: The Faction of the Fooling Fish) Also that year, an anthropomorphic cockatoo or chicken from the Prime Earth and his hapless waterfowl companion fell through a dimensional warp in the Prime Universe's Time Vortex, and ended up in the Void. They parked the broken machine at the Interdimensional Tavern where the inventor stayed to guard it while his friend went on an adventure through the Void to find a piece which had become detached from the vehicle. While he was waiting, the inventor met Bibliophile-962 and other members of the Crew's Department of Documentation, who'd taken a trip to the Tavern on their lunch break to help with the writing of a Cupid Fact File on the Tavern. (PROSE: The Interdimensional Tavern)