The compact massive stellar cluster enclosing a DCBH in its host halo at z =  12.7 from the Enzo simulation in M. A. Latif et al. (2026). The stellar mass is 1.2 × 10⁸M_⊙, the great majority of which is due to chemically enriched Pop II stars. Purple dots mark the positions of small Pop II star particles, which are mostly clustered within a 150 pc radius, and the black spot shows the position of the DCBH.