Distribution of MP Galactic halo stars in the [Na/Fe]–[Fe/H] (top) and [Al/Fe]–[Fe/H] (bottom) diagrams, as predicted by the NEFERTITI model: Pop III descendants (in light grey) and Pop I/II descendants (in dark grey). The data points represent all MP SAGA stars, colour-coded with log g, in LTE (left) and NLTE (right). Stars with parameters within the grids are marked with crosses (X), while circles indicate stars outside these limits. Triangles represent stars whose published abundances were already corrected for NLTE effects. The right marginal plots compare the SAGA [Na/Fe] and [Al/Fe] distributions in LTE (blue) and NLTE (black), excluding stars with upper or lower limits. The standard deviations of the distributions are noted at the top.