Kinematic emission line decomposition from simultaneous fitting to PRISM (black) and G395M (grey) spectra. Top: Hα emission and absorption complex. It is well-described by a broad Lorentzian profile (blue; FWHM ∼ 1400 km s⁻¹), with weaker narrow emission (cyan) as well as redshifted absorption (purple). The total G395M model and residuals are shown in red. Bottom: Zoomed-in images of other strong H and He features, also revealing a non-detection of the [O III] doublet (see Table 1). Although (where possible) both dispersers were used in the fitting, in the bottom panels we show only the PRISM model components and total model (orange).