A male human, a Serenno planet native, was born and was the brother of both the Serennian Duke Solha and Solha's sister. This family of siblings sided with the Confederacy of Independent Systems, and Count Dooku, the Separatist leader, dispatched them to Mokivj to oversee the production of cortosis B2 super battle droids and the mining operations for cortosis.
Around 19 BBY, Anakin Skywalker, a Jedi Knight, and Thrawn, holding the rank of Senior Captain, infiltrated the droid factory of the three Serennians. This occurred as Solha's brother and sister engaged in conversation with workers in the complex's courtyard, situated near an unidentified_speeder_truck. While Solha engaged with Padmé Amidala, a Senator of the Galactic Republic, the duke's siblings launched an attack on Skywalker and his Chiss ally. However, the pair emerged victorious against the Serennian battle droid forces. Ultimately, they detonated the factory by triggering an explosion within a nearby cortosis mine. Like his siblings, Solha's brother was seen wearing a Serennian cloak. He later donned clone trooper armor reinforced with cortosis, intending to shield himself from Anakin Skywalker's Jedi abilities.
The character of Solha's brother made his initial appearance within the Clone Wars narrative of Thrawn: Alliances, a 2018 novel penned by Timothy Zahn. This novel represents the second entry in the Star Wars: Thrawn trilogy.