Leebon was a Selonian, specifically a female, who held the rank of Jedi Master in the High Republic Era. She mentored Matthea Cathley, a Jedi Padawan, around 382 BBY, with both stationed on the lunar surface of Jedha. Following Vildar Mac's arrival on Jedha, Leebon instructed her Padawan to make contact with him. During the conflict known as the Battle of Jedha, Leebon, alongside Oliviah Zeveron, tried unsuccessfully to safeguard the Final Protector statue from destruction. Subsequently, Leebon was seized by individuals belonging to the Path of the Open Hand and transported to a Jedi vault located within the statue. There, she suffered petrification, a transformation into stone, at the hands of the Leveler.