Franco was a reptillian humanoid companion of Iris Wildthyme together they had adventures involving The Death Miners of Agapas, the Dreamsmiths of Heralda, and Supremo's Massive Mirror of Manipulation.
Several months into their adventures, Iris took Franco to an ancient amusement park where she intended to foil a plan by a group of Sentient Coffee Makers to mass-produce Astro - a highly addictive coffee drink which contains a time-active substance that slowly erodes a person's history the longer they use it and ultimately results in them vanishing from time. The Coffee Makers - led by an individual who Iris nicknamed Mugs - attacked the pair, severing Franco's tail, and tied them up to one of the park's attractions.
Iris explained how the continued consumption of Astro could lead to a temporal sinkhole with the entire galaxy collapsing into a giant God Engine. When Mugs and the Coffee Machines continued with their plans she escaped by head-butting Mugs causing him to spill his acidic grinds onto the cable binding her. She managed to rescue Franco and the pair escaped from the amusement park back to the shuttle. In orbit Iris realised that the data she had previously been given was incorrect and the tipping-point was twenty-seven percent and she watched as a temporal shockwave began to rip apart the galaxy.
Stuck inside the God Engine, Iris realised that her special relationship with time was keeping her sane but France was now acting as a battery for the God Engine was was unable to remember her or their adventures. Iris decided that she needed to kill Franco in order to escape the God Engine and stop the Maker's schemes before he destroyed the entire universe. Franco agreed to die and Iris shot him allowing for her to escape. However, back on the shuttle, Iris indicated that she believed Franco's severed tail - which she had brought back with her from the amusement park - would regrow his body. (PROSE: God Engine Rhapsody [+]Julio Angel Ortiz, Iris: Fifteen (Obverse Books, 2013).)
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