Left: Comparison of the inferred parameters of the Be star companion to MIST single star evolutionary tracks. The position of the Be star in the HRD is consistent with a M_Be, evol = 6.5 ± 0.9 M_⊙ B-type dwarf. Right: Summary of constraints on stellar mass for the Be star companion. The temperature and luminosity-based mass estimate is shown as a red horizontal line, with the shaded region indicating the uncertainty estimate. The spectroscopic mass is shown in black with the uncertainties exceeding the plotted mass range. Blue, green, and grey curves indicate Be star masses inferred from the binary mass function (f_bin) as a function of inclination angle. The different colours correspond to different estimates of the mass of the stripped star: M_B, spec = 0.69 M_⊙, as inferred from the spectroscopic analysis, and M_B, evol = 0.99 M_⊙, the stripped star mass of the best-fit MESA evolutionary model. We note that for the Be star, the minimum allowed dynamical mass, M_Be, dyn ≥ 7.0 M_⊙ assuming M_B = 0.69 M_⊙, is somewhat larger than the inferred evolutionary mass.