HST imaging and kinematics of the lensed galaxy S0. Left panel: HST/WFC3 image of CSWA 31 in the F160W band. The orientation is marked by the black arrows (north upward and east leftward) and kept fixed for other panels. The BGG at z = 0.683 is surrounded by six multiple-image sets at different redshifts marked with circles, using a different color for each set. The image sets S0 and S1 are bright features from the same spiral galaxy at z = 1.49, with a zoomed-in image of S0(d) in the right inset. The green square shows the de-lensed S0 position in the HST imaging. The green ellipses in the zoomed-in panel illustrate the minor variations in distortion over S0(d) caused by strong lensing. Right panel: [OII] intensity map (top) and the LoS velocity map (bottom) for the S0(d) image extracted from MUSE IFS. The FWHM of the MUSE PSF is shown in the upper left in the intensity map. The bold black cross shows the adopted S0(d) centroid determined from ^3DBarolo.