Top panels: position of HE 0107−5240 (filled black star) in the Toomre diagram (left) and the orbital energy versus angular momentum (right). Bottom panels: square root of the radial action versus the azimuthal action (left) and action diamond (right). Coloured points represent stars from the good-parallax sample of Bonifacio et al. (2021). The red and green shaded areas indicate the regions defined by Feuillet et al. (2021) to select candidate Gaia-Sausage-Enceladus (GSE) and Sequoia stars.