Yaddle trained Rancisis in the Jedi arts, and he proved to be an adept wielder of the Force and a tactician, with a keen sense for military strategy. Rancisis was accepted by the Jedi Order, and eventually selected by Jedi Master Yaddle, a revered member of the Jedi High Council, as a Padawan.
She hoped that, after his training had been completed, he would return to Thisspias and succeed her as Blood Monarch, and use the wisdom and power taught to him by the Jedi for Thisspias's benefit. The son of the female Blood Monarch, who ruled over Thisspias, he was discovered to be force-sensitive as an infant, and his mother offered him to the Jedi Temple on Coruscant for training in the ways of the Jedi in 200 BBY, when Rancisis was six standard years old.
Oppo Rancisis was a Thisspiasian mle born on the planet Thisspias in 206 BBY.