Component of the velB-VosA heterodimeric complex that plays a dual role in activating genes associated with spore maturation and repressing certain development-associated genes (PubMed:23264641). The complex binds DNA through the DNA-binding domain of vosA that recognizes an 11-nucleotide consensus sequence 5'-CTGGCCGCGGC-3' consisting of two motifs in the promoters of key developmental regulatory genes (By similarity). Forms a heterodimeric complex with velB; the formation of the velB-vosA complex is light-dependent (By similarity). Interacts with velA, velB and velC (PubMed:23264641). The N-terminal velvet domain contains a NF-kappa-B-like fold and is involved in DNA-binding (By similarity). Results in a severe conidiation defect with reduced sporulation (PubMed:23264641). Belongs to the velvet family. VosA subfamily.