Just as the Nirvash typeZERO was the basis of Light Finding Operations in the first series, Mark I was the basis of all IFOs. This Nirvash was originally created by Renton as a gift for Eureka and was named Nirvash Mark I in honor of the Nirvash they piloted together in Eureka Seven. It was renamed Nirvash Neo by their son, Ao, shortly after he became its' pilot in Eureka Seven: AO.