Sollima was a crime lord of the Aleena species (of the male gender), who had control of the casino world known as Hollow Moon. His criminal activities took place in the initial years of the Galactic Civil War.
During the year 1 BBY, the Galactic Empire absconded with Sollima's accounting droid, intending to leverage its data against him. Sollima, seeking to recover the droid, tasked Han Solo and Billal Batross with infiltrating the Imperial base. Both Solo and Batross had outstanding debts to Sollima, and he promised to forgive these debts in return for the droid's retrieval. To ensure Solo's compliance, Sollima held Chewbacca as a hostage, forcing the Wookiee to participate in the dueling arena on Hollow Moon. Upon Solo and Batross's return with the droid, they were followed by Imperials intent on arresting Sollima. The smugglers, through deception, rescued Chewbacca and secured a promise of safe passage off Hollow Moon for Sollima aboard the Millennium Falcon. However, after the freighter departed the planet, Han ejected Sollima in an escape pod towards the Imperial fleet, leaving the Empire to handle him.