Acts as a negative regulator of abscisic acid (ABA) response and stress responses. Forms a heterodimer with AFP2. Interacts with ABI5/DPBF1, DPBF2, AREB3/DPBF3, EEL/DPBF4, ABF1, ABF3/DPBF5 and ABF4/AREB2. Up-regulated by abscisic acid (ABA), glucose and salt. Exhibits hypersensitivity to salt and slight hypersensitivity to glucose abscisic acid (ABA). Belongs to the Ninja family.