N'Mrith served as an associate to Jabba Desilijic Tiure while on Formos. This creature, resembling a fish, favored environments characterized by warmth and high humidity.
Acting as a contact for smugglers involved in the Kessel Run, N'Mrith facilitated the loading of spice onto smuggling freighters. He did this while posing as someone who sells mining equipment. Around 1 BBY, N'Mrith became the contact for Han Solo and Chewbacca, who journeyed to Formos with the intention of smuggling spice on behalf of Jabba Desilijic Tiure. Regrettably, the pair had garnered the notice of the local commander, Colonel Quirt. N'Mrith, fearing the possibility of attracting Imperial scrutiny, requested that the two meet him at Zord's Atmosphere Baths. At this location, N'Mrith advised the duo to minimize attention and remain hidden until he gave them instructions to load the spice.
Shortly thereafter, Colonel Quirt confronted N'Mrith, revealing his comprehensive knowledge of N'Mrith's illicit activities. In an effort to protect himself, N'Mrith identified Solo and Chewbacca as smugglers. To evade incarceration, N'Mrith assisted Quirt in orchestrating an ambush for the Millennium Falcon. Unluckily for N'Mrith, Chewbacca jettisoned the spice upon sensing the trap, leaving Quirt's forces without the necessary evidence to detain the pair. The absence of evidence led Quirt to the conclusion that N'Mrith had been untruthful. Consequently, Quirt imprisoned the alien aboard his Imperial prison ship, with the intention of sending him to the spice mines located on Kessel.