Graf Zapalo was a male human who held the position of Master of Sciences within the Naboo Royal Advisory Council throughout the Fall of the Republic. As a minister within the council, his duties involved providing counsel to the monarch of Naboo and shaping the direction of public policy on the planet of Naboo. Furthermore, he acted as an advocate for both the agricultural community and the philosophical thinkers of Naboo. Moreover, Zapalo possessed exceptional expertise in the field of oceanography.
In 32 BBY, Zapalo was a member of the council serving Queen Padmé Amidala in the time leading up to, and during, the Invasion of Naboo. A decade afterwards in 22 BBY, Zapalo remained a council member, now advising Queen Jamillia, and he was present at the Theed Royal Palace at the time that Senator Padmé Amidala and Jedi Padawan Anakin Skywalker arrived, following a plot to assassinate Senator Amidala.