I think it is one of those typical cichlid things, you won't know until you try. Just for info, I have 5 cupids together and they are all male. (Apparantly hard to find females). There is not much written about them but was told they would be skittish and aggressive. Mine are neither. There is a minor amount of chasing between the 3 bigger males (2 biggest about 3 inches now) and they are always out and about. Not skittish at all.
I'm no expert but I would think it has a high likely hood of working.