Sar Agorn was a Jedi Consular of the Old Republic. Of a very rare species, Sar Agorn was a bulbous, soft creature that lacked facial features and was constantly surrounded by greenish gases. Amassing an impressive amount of Jedi knowledge, traditions, and philosophy.
Before he became one with the Force, Sar transferred much of his knowledge into a holocron so that future students might learn from all that he had learned during his time as a Jedi Knight. When creating the holocron, Sar set up his gatekeeper persona to be cautious of revealing certain information or techniques to a young Jedi unless he felt that the student was prepared to handle to responsibility and consequences of that knowledge.