The Stallo's kin, a female human, resided within a village situated on the planet of Carajam. Sometime between approximately 2 BBY and 4 ABY, the inhabitants of the village were taken hostage by the offender Zingo Gabnit, who intended to ensnare the bounty hunter known as Boba Fett. Upon Fett's arrival, he liberated the villagers, killed Gabnit, and absconded with his body to collect the associated bounty. News of Fett's deeds traveled to Stallo by the time the bounty hunter made his way to a town, where Stallo encountered him, expressing gratitude for saving their sister's life and requesting assistance in combating Gabnit's confederates, the Xan sisters.
The sibling of Stallo appeared in the comic one-shot Age of Rebellion - Boba Fett 1, released by Marvel Comics on May 8, 2019. This comic formed a component of the Age of Rebellion miniseries and was authored by Greg Pak.