Top panel: Shifted and median combined hermes spectra of TIC 470710327 A (S/N > 80). Solid vertical blue lines denote He i lines, dashed vertical blue lines denote He ii lines, dotted red lines denote metal lines, and the shaded grey region denotes a diffuse interstellar band. Bottom panel: each panel displays a set of two lines used for diagnostic determination of spectral classification by Sota et al. (2011).