Left: [Si/Mn] vs. [Al/Fe] abundance plane for the two clusters associated with GSE and the in situ sample. The three highest-density levels are shown with filled contours (spanning from 60% to 100% of the peak KDE density), while stars outside these regions are plotted as scatter points to highlight lower-density members. Black lines denote limits commonly adopted in the literature. Right: same for [Si/Mn] vs. [Na/Fe], with a gray line at solar.