Examples of Si II λ1526 absorption and fluorescent emission profiles drawn from different haloes and LOS among our seven simulation snapshots. The spectra were selected using KMeans clustering to span a diverse range of spectral properties, including the equivalent width of absorption, residual flux, velocity centroid, and fluorescence strength. Each panel shows the normalised spectrum (blue) along with a dashed horizontal line at the minimum flux level, and a vertical dotted grey line at line centre. The red line highlights the value of the residual flux, which is indicated at the top of each panel, along with the corresponding f_esc.