I'd thought of Conchita and Pardo as fairly generic, able to slot into various roles - not very well defined, but maybe useful to just have a couple of extra crew around.
AND would totally be up for fleshing them out - happy to do that this evening, but, also, if you have any ideas for developing them @timplausible or indeed anyone, please throw them in here. I'll probably take most/all of what you come up with.