Yenna was a member of the Nightsisters from Dathomir who existed near the end of the Republic Era. Crafted by Falta, a witch without a clan, Yenna's body was formed from clay, shells, and various other substances. Falta then adopted Yenna as her own child. Due to the unique nature of her creation—Falta's unprecedented use of magick, influenced by Nightsister burial practices—Yenna drew the interest of Mother Talzin, the Nightsisters' leader. Despite her mother's reluctance for her to join, Yenna, struggling to control her volatile abilities, ultimately accepted Talzin's proposition and became a Nightsister. Some years later, during the Clone Wars, the Separatists initiated an attack against the Nightsisters. During this conflict, Yenna, following Talzin's instructions, was put into a sleep state and locked inside a class three lifepod. This pod was then launched, programmed to land somewhere in the Mid Rim. After arriving at the Nightsister fortress to look for her daughter, Falta learned from the dying Daka that Yenna had been sent away. Departing Dathomir, Falta searched the Outer Rim for her daughter, eventually arriving at the planetoid Sídi, where she intercepted a message indicating Yenna's location within the Mid Rim.