MIRI-MRS spectrum of Cen A’s nucleus (magenta). The extraction region is shown in Appendix B. Black curves indicate the total best-fit models from the MIR decomposition tool (Donnan et al. 2024); the blue and grey curves show the fitted continua (stellar + AGN) and PAH components, respectively. Residuals are displayed beneath each panel, with the corresponding reduced χ² reported next to the legend. The top panel includes PAH features in the fit, while the bottom panel shows the fit obtained when PAH features are excluded.