Firtha, a member of the Croke species, resided in the Croke Reach located within the Unknown Regions. He held the title of Shell Conjurer and made his home on the Croke settlement known as Explume Minor.
The Croke people experienced significant hardship in their history, specifically during an extended civil war that took place within the Croke Reach. The circumstances deteriorated substantially when one of the warring sides brought the ravenous Lugubraa, a typical mercenary race from the Unknown Regions, onto the planets in that region. The Lugubraa, who multiplied rapidly, decimated numerous Croke communities, and their feeding became uncontrollable. Seeking to eradicate the invading lifeform, the Croke acquired genetically engineered Lugubraa, called blind berserkers, from the cloners of Kamino. These clone soldiers, unfortunately, proved to be equally troublesome as the original Lugubraa, leading to even greater destruction in the Croke Reach.
Explume Minor was among the settlements targeted by the Lugubraa. Firtha's final communication involved directing the removal of young Croke from the colony. During his message, he was overcome and perished at the hands of the attacking force.