Variations in the recombination line profiles of, from left to right, He I 6678 Å, He II 5411 Å, and C IV 5808 Å during the coronal line stage. The spectra were normalized to the flux at −3800 km s⁻¹ for display purposes, and the numbers indicate days since the outburst. The helium lines are included to highlight the ionization state of the ejecta (see text for further discussion).