Spectra at the peak of flares observed with HST-COS for Karmn J07446+035 (left) and 2MASS J02365171-5203036 (right). For both stars, green spheres indicate continuum flux measurements at the flare peak, while grey diamonds represent the quiescent continuum levels. Associated uncertainties are shown as light-coloured lines – green for flare peak and grey for quiescence – with only upper error bars displayed for clarity, as the errors are symmetric. The light-red lines correspond to the best-fit continuum models obtained using the COScut1 (left panel) and COScut2 (right panel) setups. The dash-dotted green and light-green lines represent the inverse H6CIII models for the flare peak and pre-flare states, respectively, while the dashed blue lines show the simplified inverse H6 models. The background light-grey spectra are the xdsum spectrum.