during when the demons hunter save the south kingdom land the 10 demon pillars heirs out of 27 come to a meeting. a-yin was in disguise as a demon spying on the meeting when Mendi and ah bao walks in as the other demons heir bow to them and a-yin also bow as well to not let they find out she not a demon. Mendi says to the demons heirs * tomorrow you all know what day it is ! it the day when we get the divide for the demon king to become godhood