A Kel Dor from Dorin and descendent from a long line of Jedi, Plo Koon masterfully uses his highly-developed extrasensory organs to enhance his Jedi mind powers to extremes.
Plo Koon is legendary for his leadership in the Stark Hyperspace Wars, during which he took up the Republic banner after a great Jedi Master was killed. Koon rallied the disheartened troops to an unlikely and miraculous victory, and has ever since been a trusted ally to the Republic Army and Navy as a Jedi Council member.
Plo Koon has fought along side Qui-Gon Jinn on several occasions, and looked forward to the day his friend might consider filling one of the Council's short-term positions.
In the The Phantom Menace, the Plo Koon character was outfitted with special protective goggles and an antiox mask, which protected the character on oxygen-rich worlds like Coruscant.