Integrated (v_rad = 270 − 325 km s⁻¹) [S II] λ6731 continuum-subtracted image of the RU Lupi jet with a sector of the ALMA 1.3 mm dust continuum disk image shown in white contours (Andrews et al. 2018). The ALMA beam size (3.5 × 3.4 au) is shown in the lower left corner. The red arrow delineates the disk PA and radius from Huang et al. (2018) (121° ± 5°, 63 ± 1 au), and the dashed green line shows the jet PA measured here (213° ± 2°). The jet and outer knot are perpendicular to the disk, but the inner bright region of the jet at < 50 au from the source is asymmetric about the green line.