You defenitely have a female. Their eggs are salmon colour and shiny round little balls. In the absence of a male, the female will lay her eggs against any surface and guard it fiercely against other fish. You will find that after a few hours she will lose the battle and they are eaten by other fish.
Bangai's are borne either male of female. The female lays her eggs in a clutch. While she's releasing the eggs the male takes it into his mouth (pouch) where he aerates it for more or less 20 days before replicas of the mature fish are released.
Yuvenile Bangai's will get along until they mature, whereafter fighting will start between 2 males. Females are slightly more forgiving and in bigger tanks could manage to get along.