Ephaan Kenzon was a being with Force-sensitive abilities. He was found on the Outer Rim planet of Baltimn and subsequently taken to Coruscant to undergo Jedi training.
He ultimately became the Jedi Padawan of E'koth Tassjun. Nearing expulsion due to his unsanctioned interventions against injustices within the Zeemacht Cluster, he chose to depart from the Jedi Order. Subsequently, he established the School of Hidden Wisdom on his homeworld. During the Great Jedi Purge, he provided refuge for fleeing Jedi Knights at his dueling school and also imparted fundamental Jedi skills to other Force-sensitives. During the Galactic Civil War, Kenzon secretly worked as a Rebel agent. In 4 ABY, both he and his school attracted the attention of the Imperial forces, but the death of Palpatine prevented the Inquisitorius from uncovering and eliminating him and his students.
A number of his students later continued their training under Luke Skywalker at the Jedi Praxeum situated on Yavin 4.