Hi Dr Seow, I would agree more with Aaron at least for the second individual, the ground colour seems too greyish from that of the regular pale brown of female R. dieneces we typically see. In C&P5 it mentions in the key ID feature for R. cowani females "uppersides always with a cupreous discal patch on the forewing and sometimes with a cupreous subtornal patch on the hindwing", which closely resembles that in the pictures. Could you have another look at it again?