Calvino led his group to steal a Grey Ash plant, and included Bonnaro in the team, incurring a bounty. However, Bonnaro double-crossed him, stealing the plant in order to cure his sister. Calvino tracked him down at the Venus spaceport, eventually running into him in a bathroom. He interrogated Bonnaro and, using his sister, got him to lead him to Spike Spiegel, who Bonnaro had given the plant to. When Bonnaro tried to protect Spike, Calvino started a firefight, but Faye Valentine, also looking for him, cornered him and he gave up. 
Calvino is visually inspired by gangster rapper Notorious B.I.G.