Nirvash typeZERO is a sentient humanoid mecha (LFO) from the anime series 'Koukyoushihen Eureka Seven.' It is piloted primarily by Renton Thurston and Eureka. Nirvash plays a crucial role as both a powerful weapon and a mysterious entity with its own will and emotions. Serving as the centerpiece of many key battles, Nirvash helps drive the development of the main characters and is central to the unfolding of the series’ overarching mysteries and themes.