Plays a role in the definition of cell polarity via the planar cell polarity (PCP) cascade. Acts downstream of fuz and accumulates asymmetrically in wing cells to regulate planar polarity in the wing. Probably acts by regulating ciliogenesis. Interacts with mwh. Localizes in the vicinity of plasma membrane and the cortical actin cytoskeleton of wing disk and pupal wing cells (PubMed:10570461). Localizes to the proximal side of wing cells, fuz and frtz are required for its localization (PubMed:15556868). Abnormal wing hair polarity and in many wing cells forming two or more hairs instead of the normal single hair. Belongs to the inturned family.