Boss Nass is the stern, authoritarian leader of Otoh Gunga, the large underwater city on Naboo. Always wary of contact with humans and other "outlanders," the ruler prefers to keep the Gungan culture isolated from his home planet's surface inhabitants. His distinctive green skin color differs from other Gungans, revealing his Ankura Gungan lineage. A fair but stubborn ruler, Boss Nass has grown large and prosperous in his advancing years.
Design of Boss Nass actually evolved out of the basic design of Jar Jar Binks. This resemblance was evident in the early sketches of the Gungan leader, but the conceptualization evolved considerably, and as the number of sketches grew, so did the physique of the character. The final design depicted a stout, fleshy and imposing creature with a detectable difference in lineage from other Gungans seen in Episode I.