Example corner plot of Elf Owl fits to NIRSpec/prism data for RUBIES-BD-1. Diagonal panels display the marginalized posterior distributions for T_eff, ﹩\mathrm{log}{\rm{g}}﹩, [M/H], C/O, ﹩\mathrm{log}{\kappa }_{{\rm{zz}}}﹩, and distance, while the inner panels display contour plots of distributions marginalized over parameter pairs to illustrate correlations. Contour shading indicates likelihood values, and lines trace 25%, 50%, and 75% likelihood thresholds. Magenta lines indicate the parameter values for the best-fitting individual model, while the vertical dashed lines in the marginalized distributions indicate the 16%, 50%, and 84% quantiles.