Eeusu Estornii served as a Senator representing her constituents in the Galactic Senate of the Republic, and was female. A supporter of Senator Padmé Amidala, she joined the many individuals who paid their respects at Amidala's funeral on Naboo, her homeworld, in 19 BBY. Estornii was seen with other senators following the casket in the funeral procession. Her physical appearance included white skin, black eyes, and blonde hair. At the funeral ceremony, she was attired in a dark red dress and adorned with a black piece of jewelry on her brow.
Eeusu Estornii made an appearance in Revenge of the Sith, a film belonging to the prequel trilogy released in 2005. The scene featuring her procession was filmed at Fox Studios, Sydney on Stage 3, specifically on September 16, 2003, which marked the 57th day of principal photography. Jacqui Louez, who worked as an assistant to both director George Lucas and producer Rick McCallum, portrayed Estornii. Sue Rostoni, the executive editor at Lucas Licensing, received the opportunity to select and name one of the unnamed characters from Revenge of the Sith, and chose to name the character after herself. This name was officially integrated into the new Star Wars canon through its inclusion in the 2017 reference book, Star Wars: The Visual Encyclopedia. Prior to this, within the Star Wars Legends continuity, the name initially appeared in the 2005 reference book titled Star Wars Chronicles: The Prequels.