Bar asymmetry evolution (left two columns) and outer disc asymmetry evolution (right two columns), shown with cubic spline fits for all KRATOS simulations that include the full G_MW–G_LMC–G_SMC interaction. Models are grouped together if they share pericentric passages between G_LMC–G_SMC (vertical dashed blue lines) at the same timestamps. The bar asymmetry evolution is measured in mean radial velocity, 〈V_R〉 (left-most panels), and mean residual tangential velocity, $⟨V_{\varphi }-\overline{V_{\varphi }}⟩$ (centre-left panels). Data is shown only after the first 1.25 Ga, when the disc is relaxed. It is presented with a solid line when a bar is formed (relative m = 2 Fourier amplitude Σ₂/Σ₀ > 0.2), and with a transparent line when there is no bar. The outer disc asymmetry evolution is represented by the extrema in the mean radial velocities, EXT〈V_R〉 (centre-right panels), and extrema in the mean residual tangential velocities, EXT$⟨V_{\varphi }-\overline{V_{\varphi }}⟩$ (right-most panels). In all panels, the horizontal black lines mark zero asymmetry and the Gaia asymmetries are shown with horizontal purple lines.