Mean Lyα luminosity (top panels) and UV magnitude (bottom panels) as a function of the LAE multiplicity for redshifts z = 2.4 (left), z = 3.1 (middle), and z = 4.5 (right). Solid black lines correspond to the TNG100-true multiples, dashed pink lines show the TNG-identified multiples (with rp_max = 100 pkpc at z = 2.4, 70 pkpc at z = 3.1, and 50 pkpc at z = 4.5), and dotted cyan lines correspond to the ODIN-COSMOS sample under the same selection criteria. The lighter black and pink lines indicate the mean UV magnitudes perturbed by photometric uncertainties for the mock samples. Error bars represent the standard error of the mean. Overall, both Lyα luminosity and UV magnitude tend to increase slightly with LAE multiplicity, supporting the idea that multiple LAEs trace more massive and actively star-forming halos.