Changes in the flare shapes in the PC space along the MS. The points denote the median value of the PC coefficients for the stars in the given bins from Fig. 9, colored with T_eff. The error bars show the standard error of the median, $\sqrt{\frac{\pi }{2N}}$ times the standard deviation (assuming roughly normal distributions). In each subpanel, only the inner 10% of the range from Fig. 12 is shown.