Nightlily, whose proper designation is M'iiyoom Onith, was a female H'nemthe known for her cutting tongue. Onith could be found in Chalmun's Spaceport Cantina's hidden chambers in the Mos Eisley spaceport situated on the planet of Tatooine during 0 BBY. She was sharing a booth with Feltipern Trevagg, the Gotal tax collector, and Elis Helrot, a Givin smuggler. Oblivious to the potential consequences, Trevagg attempted to woo Onith, placing an arm around her shoulder as they laughed, just as Luke Skywalker, a local moisture farmer, entered the cantina alongside Obi-Wan Kenobi, a Jedi Master, and the droids R2-D2 and C-3PO. Onith was also conversing in H'nemthe while laughing.
The pair remained seated beside Helrot in their back room booth. Later, Skywalker and Kenobi had an incident at the bar with Doctor Cornelius Evazan and [Ponda Baba](/article/ponda_baba], both criminals. Following this, Trevagg informed his Imperial contacts about the Jedi's arrival. Onith's appearance included brown skin, black eyes, and a brown shawl that she wore within the cantina.
M'iiyoom Onith's initial appearance was in Star Wars: Episode IV A New Hope, a film from the original trilogy that premiered on May 25, 1977. Phil Tippett, who received no credit for the role, portrayed Onith. Tippett created Onith's mask, among other alien masks, for additional scenes filmed for the cantina sequence. These scenes were shot on a Dovington's Hollywood studio sound stage between January 24 and 25, 1977. The character Hennet Kayn later used the shawl in conjunction with Trevagg's mask during these supplemental shots.
Tippett crafted the mask by making a latex copy of makeup artist Rick Baker's creepy baby mask from the 1974 movie It's Alive. He then sculpted Onith's mask over it, layering polyfoam and stippling the surface with latex, layers of tissue and cotton, and numerous textured dots. It is believed that the final design drew inspiration from a sketch by Ralph McQuarrie called "Cantina Creature Head," originally intended for the Rodian character Greedo.
Onith, known as Yam Nose on set, was slated to be named Yamnoss; however, this did not happen. Nevertheless, a H'nemthe character appearing in 1978's The Star Wars Holiday Special, who wore Onith's mask, was eventually given that name. The mask was also used for another H'nemthe character in the 1983 movie Star Wars: Episode VI Return of the Jedi. In 2012, Maria Teran of Tom Spina Designs cleaned and restored the original mask, which was in excellent shape, requiring only a few patches of missing latex to be added and painted.
Within the current Star Wars canon, Onith was identified in the 2016 reference book Star Wars: Complete Location. The character's name originated in the Star Wars Legends continuity, first appearing on a card in the 1995 Premiere Limited set of the Star Wars Customizable Card Game by Decipher.