Rulo, a Rodian male, held the rank of Jedi Knight within the Jedi Order. He served during the declining years of the Galactic Republic.
After it was discovered that Rulo was Force-sensitive, he underwent training at a Jedi Order's academy to learn the ways of the Force. He eventually achieved the rank of Jedi Knight. Rulo, now a Jedi, was assigned to the experimental academy located on Almas. There, he chose Lo Pelkar, a Human, to be his Padawan. They operated together from the academy, mainly undertaking assignments given by the Almas Council that dealt with activities happening in the Cularin system.
In 31 BBY, Jedi Rulo and his Padawan Pelkar were sent to look into the widespread destruction of the kaluthin. The kaluthin, a growth that released oxygen and kept Almas able to be lived on, was dying off rapidly around the planet due to mysterious reasons. Their investigation led them to a local establishment called Building 49-A, where they learned that the locals suspected the Jedi were to blame. Remaining calm, the Jedi managed to find the real culprits: the Dark Jedi Kosa-Yin Hadu and Gar Granga. Rulo and Pelkar fought the two Dark Jedi, successfully defeating them and resolving the crisis.