Full wavelength range of disentangled spectra and models. The disentangled spectra of the narrow-lined stripped star (dark blue) and the Be star (orange) are shown across the full wavelength range, scaled to their respective flux contributions. Overlaid are model spectra with the inferred parameters, plotted as dash-dotted and dashed lines, respectively. The observed spectra, co-added for improved S/N and shifted to the rest frame of the stripped star, are displayed in grey and normalised to a continuum level of one. Key spectral lines are labelled at the bottom. Narrow, unlabelled features in the Be star’s disentangled spectrum are spurious, primarily resulting from telluric and interstellar absorption lines, as well as artefacts from the disentangling process.