RVS spectrum (blue histogram) of the very metal-poor star Gaia DR3 6268770373590148224 whose MatisseGauguin atmospheric parameters are T_eff = 5331 K, log(g) = 2.54, [M/H] = −3.19 dex, and [α/Fe] = 0.56 dex (S/N = 419). The model spectra correspond to the lower and upper [M/H] values (−3.60 and −2.71 dex in orange and green, respectively). No rotational profile was applied (suspected low-rotating star). See text for more details.