Petro was a male Human Jedi youngling who lived during the Clone Wars. Around 20 BBY, he, along with the best of his class of younglings, were assigned to travel to "the Gathering" on Ilum with Yoda and Ahsoka Tano to construct their lightsabers.
Petro had a competitive streak that sometimes rubbed his fellow students the wrong way. He was a young boy during the Clone Wars, when the Jedi Knights were overextended fighting in the galactic conflict to protect the Republic. Because the Jedi Order needed a new generation of Jedi Knights, it was important that he undergo a crucial Jedi ritual known as The Gathering. On the frozen world of Ilum, Petro had to seek out the crystal that would become the heart of his lightsaber. He longed to construct his Jedi weapon, and become a new legend in the history of Jedi warriors.