Ydra Kilwallen Sibwarra was a female Human Padawan who served both the Jedi Order and the Galactic Republic. She survived the horrific Great Jedi Purge, and later became the mother of a son named Dev.
Ydra Kilwallen, a Force-sensitive Human, received training in the ways of the Force from the Jedi Order. Due to her status as a Jedi, the Imperial Security Bureau issued an arrest warrant for her, prompting her departure from the Core Worlds. Eventually, Kilwallen married a man, and together they had a son named Dev.
After learning of the disappearance of a fellow Force Adept, Ydra fled Chandrila. Without informing her husband, she took Dev and relocated to the remote colony world of G'rho. There, her brother Trig resided in Boku Settlement with his new wife Seni. Trig assisted her in obtaining a position as a historian under Brco, an Ilwizzt who led the G'rho Defense Force. Recognizing the potential of the Force within her son, Sibwarra commenced teaching him the basic Jedi skills she possessed.
In 2 BBY, G'rho suffered an attack by the Ssi-ruu, resulting in Dev's enslavement. Sibwarra was subjected to entechment, and through the Force, her son felt her life fading, realizing she was lost to him forever.