Essential component of the RMI complex, a complex that plays an important role in the processing of homologous recombination intermediates (By similarity). Component of the BTR double Holliday Junction dissolution complex, which is involved in homologous recombination during meiotic double strand break in the germline (Probable). Plays a role in double strand break repair by positively regulating the accumulation of rad-51 at double strand breaks (PubMed:34252074). Stabilizes and positively regulates the localization of the BTR double Holliday Junction dissolution complex components rmh-1, him-6 and top-3 at nuclear foci during meiotic recombination (PubMed:34252074). Positively regulates meiotic recombination, chiasma formation, and chromosome segregation in meiosis (PubMed:34252074). Positively regulates DNA crossover formation and positioning on chromosome arms (away from the chromosome center) during homologous recombination (PubMed:34252074). Component of the RMI complex, containing at least top-3, rmh-1 and rmh-2 (By similarity). Component of the BTR double Holliday Junction dissolution complex composed of at least him-6, top-3, rmh-1 and rmif-2, which is involved in double strand break repair in the germline (Probable). Interacts with rmh-1; the interaction is direct and is required for mutual stability and localization at nuclear foci (PubMed:34252074). Co-localizes with rmh-1 in nuclei foci during pachytene in meiotic prophase I (PubMed:34252074). Localization at nuclear foci is dependent on rmh-1 during meiotic recombination (PubMed:34252074). Expressed in the germline. First expressed in early pachynema nuclei during meiotic prophase I in the gonad (PubMed:34252074). Expression increases in throughout mid pachynema and decreases in the late stages of pachynema (PubMed:34252074). Embryonic lethality in 40% of animals, reduced brood size and high incidence of males phenotypes (PubMed:34252074). Presence of a mix of univalent and bivalent chromosomes during diakinesis, impaired double strand breaks and chiasma formation and defective chromosome segregation (PubMed:34252074). Delayed double break strand repair with an accumulation of rad-51-positive foci in early/mid pachynema in meiotic prophase I during meiotic recombination (PubMed:34252074). Delayed accumulation of cosa-1-positive and msh-5-positive foci at recombination foci (composed of crossover and non-crossover DNA intermediates) in late pachynema indicative of a decreased efficiency in crossover designation (PubMed:34252074). Increased number of crossover events and impaired positioning of crossovers on chromosome arms during homologous recombination (PubMed:34252074). Animals have an extended mitotic zone (PubMed:34252074). Abolishes localization of rmh-1 to nuclear foci, and instead rmh-1 is localized in the cytoplasm (PubMed:34252074). Impairs the localization of him-6 to nuclear foci during pachynema (PubMed:34252074). Belongs to the RMI2 family.