Abundances of Mg/Fe, Na/Fe, and Al/Fe for the four ED-2 stars in our UVES sample (blue triangles), and for ED-2 stars from Ceccarelli et al. (2024, green diamonds). There is good agreement and small scatter. The companion of Gaia BH3 is chemically indistinguishable from the ED-2 stars. The red cross (×) corresponds to our own abundances and orange to the measurements from Gaia Collaboration (2024) (see text and Table A.1). For comparison, we have also plotted the upper limits to the abundances for several GCs from Carretta et al. (2009).